[BUG] issues in Bunkernet Register

### What happened?

HI,
One week after installing Bunkerweb, the service is still unable to register on Bunkernet, I executed the command manually and this is the result.

```
root@bunkerweb:/var/log# export DATABASE_URI="postgresql+psycopg://XXXXXXX:XXXXXXX@XXXXXXXXXXXXXX:5432/bunkerweb"
export USE_BUNKERNET="yes"
python3 /usr/share/bunkerweb/core/bunkernet/jobs/bunkernet-register.py
[2026-06-11 18:17:32 -0400] [BUNKERNET.REGISTER] [514716] [ℹ️ ] - ✅ Database connection established
[2026-06-11 18:17:33 -0400] [BUNKERNET.REGISTER] [514716] [ℹ️ ] - No BunkerNet ID found in db cache, Registering instance on BunkerNet API ...
[2026-06-11 18:17:34 -0400] [BUNKERNET.REGISTER] [514716] [⚠️ ] - BunkerNet API is rate limiting us, trying again later...
```

From the jobs view, execution is scheduled every hour

The history of the work shows that it fails in its executions

Logs of those executions:

```
scheduler.log:[2026-06-11 00:00:01 -0400] [BUNKERNET.REGISTER] [810] [❌] - Received error from BunkerNet API while sending register request : Internal server error
scheduler.log:[2026-06-11 00:00:02 -0400] [BUNKERNET.SEND] [810] [ℹ️ ] - No BunkerNet ID found in db cache
scheduler.log:[2026-06-11 00:00:02 -0400] [BUNKERNET.SEND] [810] [⚠️ ] - Not sending BunkerNet data because instance is not registered
scheduler.log:[2026-06-11 01:00:02 -0400] [BUNKERNET.REGISTER] [810] [ℹ️ ] - No BunkerNet ID found in db cache, Registering instance on BunkerNet API ...
scheduler.log:[2026-06-11 01:00:05 -0400] [BUNKERNET.REGISTER] [810] [❌] - Received error from BunkerNet API while sending register request : Internal server error
scheduler.log:[2026-06-11 01:00:05 -0400] [BUNKERNET.SEND] [810] [ℹ️ ] - No BunkerNet ID found in db cache
scheduler.log:[2026-06-11 01:00:05 -0400] [BUNKERNET.SEND] [810] [⚠️ ] - Not sending BunkerNet data because instance is not registered
scheduler.log:[2026-06-11 02:00:06 -0400] [BUNKERNET.REGISTER] [810] [ℹ️ ] - No BunkerNet ID found in db cache, Registering instance on BunkerNet API ...
scheduler.log:[2026-06-11 02:00:07 -0400] [BUNKERNET.REGISTER] [810] [❌] - Received error from BunkerNet API while sending register request : Internal server error
scheduler.log:[2026-06-11 02:00:08 -0400] [BUNKERNET.SEND] [810] [ℹ️ ] - No BunkerNet ID found in db cache
scheduler.log:[2026-06-11 02:00:08 -0400] [BUNKERNET.SEND] [810] [⚠️ ] - Not sending BunkerNet data because instance is not registered
scheduler.log:[2026-06-11 03:00:08 -0400] [BUNKERNET.REGISTER] [810] [ℹ️ ] - No BunkerNet ID found in db cache, Registering instance on BunkerNet API ...
scheduler.log:[2026-06-11 03:00:10 -0400] [BUNKERNET.REGISTER] [810] [❌] - Received error from BunkerNet API while sending register request : Internal server error
scheduler.log:[2026-06-11 03:00:11 -0400] [BUNKERNET.SEND] [810] [ℹ️ ] - No BunkerNet ID found in db cache
scheduler.log:[2026-06-11 03:00:11 -0400] [BUNKERNET.SEND] [810] [⚠️ ] - Not sending BunkerNet data because instance is not registered
scheduler.log:[2026-06-11 04:00:11 -0400] [BUNKERNET.REGISTER] [810] [ℹ️ ] - No BunkerNet ID found in db cache, Registering instance on BunkerNet API ...
scheduler.log:[2026-06-11 04:00:14 -0400] [BUNKERNET.REGISTER] [810] [❌] - Received error from BunkerNet API while sending register request : Internal server error
scheduler.log:[2026-06-11 04:00:14 -0400] [BUNKERNET.SEND] [810] [ℹ️ ] - No BunkerNet ID found in db cache
scheduler.log:[2026-06-11 04:00:14 -0400] [BUNKERNET.SEND] [810] [⚠️ ] - Not sending BunkerNet data because instance is not registered
scheduler.log:[2026-06-11 05:00:14 -0400] [BUNKERNET.REGISTER] [810] [ℹ️ ] - No BunkerNet ID found in db cache, Registering instance on BunkerNet API ...
scheduler.log:[2026-06-11 05:00:16 -0400] [BUNKERNET.REGISTER] [810] [❌] - Received error from BunkerNet API while sending register request : Internal server error
scheduler.log:[2026-06-11 05:00:16 -0400] [BUNKERNET.SEND] [810] [ℹ️ ] - No BunkerNet ID found in db cache
scheduler.log:[2026-06-11 05:00:16 -0400] [BUNKERNET.SEND] [810] [⚠️ ] - Not sending BunkerNet data because instance is not registered
scheduler.log:[2026-06-11 06:00:16 -0400] [BUNKERNET.REGISTER] [810] [ℹ️ ] - No BunkerNet ID found in db cache, Registering instance on BunkerNet API ...
scheduler.log:[2026-06-11 06:00:18 -0400] [BUNKERNET.REGISTER] [810] [❌] - Received error from BunkerNet API while sending register request : Internal server error
scheduler.log:[2026-06-11 06:00:19 -0400] [BUNKERNET.SEND] [810] [ℹ️ ] - No BunkerNet ID found in db cache
scheduler.log:[2026-06-11 06:00:19 -0400] [BUNKERNET.SEND] [810] [⚠️ ] - Not sending BunkerNet data because instance is not registered
scheduler.log:[2026-06-11 07:00:19 -0400] [BUNKERNET.REGISTER] [810] [ℹ️ ] - No BunkerNet ID found in db cache, Registering instance on BunkerNet API ...
scheduler.log:[2026-06-11 07:00:20 -0400] [BUNKERNET.REGISTER] [810] [❌] - Received error from BunkerNet API while sending register request : Internal server error
scheduler.log:[2026-06-11 07:00:21 -0400] [BUNKERNET.SEND] [810] [ℹ️ ] - No BunkerNet ID found in db cache
scheduler.log:[2026-06-11 07:00:21 -0400] [BUNKERNET.SEND] [810] [⚠️ ] - Not sending BunkerNet data because instance is not registered
scheduler.log:[2026-06-11 08:00:21 -0400] [BUNKERNET.REGISTER] [810] [ℹ️ ] - No BunkerNet ID found in db cache, Registering instance on BunkerNet API ...
scheduler.log:[2026-06-11 08:00:22 -0400] [BUNKERNET.REGISTER] [810] [❌] - Received error from BunkerNet API while sending register request : Internal server error
scheduler.log:[2026-06-11 08:00:23 -0400] [BUNKERNET.SEND] [810] [ℹ️ ] - No BunkerNet ID found in db cache
scheduler.log:[2026-06-11 08:00:23 -0400] [BUNKERNET.SEND] [810] [⚠️ ] - Not sending BunkerNet data because instance is not registered
scheduler.log:[2026-06-11 09:00:24 -0400] [BUNKERNET.REGISTER] [810] [ℹ️ ] - No BunkerNet ID found in db cache, Registering instance on BunkerNet API ...
scheduler.log:[2026-06-11 09:00:25 -0400] [BUNKERNET.REGISTER] [810] [❌] - Received error from BunkerNet API while sending register request : Internal server error
scheduler.log:[2026-06-11 09:00:25 -0400] [BUNKERNET.SEND] [810] [ℹ️ ] - No BunkerNet ID found in db cache
scheduler.log:[2026-06-11 09:00:25 -0400] [BUNKERNET.SEND] [810] [⚠️ ] - Not sending BunkerNet data because instance is not registered
scheduler.log:[2026-06-11 10:00:25 -0400] [BUNKERNET.REGISTER] [810] [ℹ️ ] - No BunkerNet ID found in db cache, Registering instance on BunkerNet API ...
scheduler.log:[2026-06-11 10:00:28 -0400] [BUNKERNET.REGISTER] [810] [❌] - Received error from BunkerNet API while sending register request : Internal server error
scheduler.log:[2026-06-11 10:00:28 -0400] [BUNKERNET.SEND] [810] [ℹ️ ] - No BunkerNet ID found in db cache
scheduler.log:[2026-06-11 10:00:28 -0400] [BUNKERNET.SEND] [810] [⚠️ ] - Not sending BunkerNet data because instance is not registered
scheduler.log:[2026-06-11 11:00:28 -0400] [BUNKERNET.REGISTER] [810] [ℹ️ ] - No BunkerNet ID found in db cache, Registering instance on BunkerNet API ...
scheduler.log:[2026-06-11 11:00:30 -0400] [BUNKERNET.REGISTER] [810] [❌] - Received error from BunkerNet API while sending register request : Internal server error
scheduler.log:[2026-06-11 11:00:31 -0400] [BUNKERNET.SEND] [810] [ℹ️ ] - No BunkerNet ID found in db cache
scheduler.log:[2026-06-11 11:00:31 -0400] [BUNKERNET.SEND] [810] [⚠️ ] - Not sending BunkerNet data because instance is not registered
scheduler.log:[2026-06-11 12:00:31 -0400] [BUNKERNET.REGISTER] [810] [ℹ️ ] - No BunkerNet ID found in db cache, Registering instance on BunkerNet API ...
scheduler.log:[2026-06-11 12:00:32 -0400] [BUNKERNET.REGISTER] [810] [❌] - Received error from BunkerNet API while sending register request : Internal server error
scheduler.log:[2026-06-11 12:00:33 -0400] [BUNKERNET.SEND] [810] [ℹ️ ] - No BunkerNet ID found in db cache
scheduler.log:[2026-06-11 12:00:33 -0400] [BUNKERNET.SEND] [810] [⚠️ ] - Not sending BunkerNet data because instance is not registered
scheduler.log:[2026-06-11 13:00:33 -0400] [BUNKERNET.REGISTER] [810] [ℹ️ ] - No BunkerNet ID found in db cache, Registering instance on BunkerNet API ...
scheduler.log:[2026-06-11 13:00:35 -0400] [BUNKERNET.REGISTER] [810] [❌] - Received error from BunkerNet API while sending register request : Internal server error
scheduler.log:[2026-06-11 13:00:36 -0400] [BUNKERNET.SEND] [810] [ℹ️ ] - No BunkerNet ID found in db cache
scheduler.log:[2026-06-11 13:00:36 -0400] [BUNKERNET.SEND] [810] [⚠️ ] - Not sending BunkerNet data because instance is not registered
scheduler.log:[2026-06-11 14:00:36 -0400] [BUNKERNET.REGISTER] [810] [ℹ️ ] - No BunkerNet ID found in db cache, Registering instance on BunkerNet API ...
scheduler.log:[2026-06-11 14:00:38 -0400] [BUNKERNET.REGISTER] [810] [❌] - Received error from BunkerNet API while sending register request : Internal server error
scheduler.log:[2026-06-11 14:00:39 -0400] [BUNKERNET.SEND] [810] [ℹ️ ] - No BunkerNet ID found in db cache
scheduler.log:[2026-06-11 14:00:39 -0400] [BUNKERNET.SEND] [810] [⚠️ ] - Not sending BunkerNet data because instance is not registered
scheduler.log:[2026-06-11 15:00:39 -0400] [BUNKERNET.REGISTER] [810] [ℹ️ ] - No BunkerNet ID found in db cache, Registering instance on BunkerNet API ...
scheduler.log:[2026-06-11 15:00:41 -0400] [BUNKERNET.REGISTER] [810] [❌] - Received error from BunkerNet API while sending register request : Internal server error
scheduler.log:[2026-06-11 15:00:42 -0400] [BUNKERNET.SEND] [810] [ℹ️ ] - No BunkerNet ID found in db cache
scheduler.log:[2026-06-11 15:00:42 -0400] [BUNKERNET.SEND] [810] [⚠️ ] - Not sending BunkerNet data because instance is not registered
scheduler.log:[2026-06-11 16:00:42 -0400] [BUNKERNET.REGISTER] [810] [ℹ️ ] - No BunkerNet ID found in db cache, Registering instance on BunkerNet API ...
scheduler.log:[2026-06-11 16:00:44 -0400] [BUNKERNET.REGISTER] [810] [❌] - Received error from BunkerNet API while sending register request : Internal server error
scheduler.log:[2026-06-11 16:00:44 -0400] [BUNKERNET.SEND] [810] [ℹ️ ] - No BunkerNet ID found in db cache
scheduler.log:[2026-06-11 16:00:44 -0400] [BUNKERNET.SEND] [810] [⚠️ ] - Not sending BunkerNet data because instance is not registered
scheduler.log:[2026-06-11 17:00:45 -0400] [BUNKERNET.REGISTER] [810] [ℹ️ ] - No BunkerNet ID found in db cache, Registering instance on BunkerNet API ...
scheduler.log:[2026-06-11 17:00:47 -0400] [BUNKERNET.REGISTER] [810] [❌] - Received error from BunkerNet API while sending register request : Internal server error
scheduler.log:[2026-06-11 17:00:47 -0400] [BUNKERNET.SEND] [810] [ℹ️ ] - No BunkerNet ID found in db cache
scheduler.log:[2026-06-11 17:00:47 -0400] [BUNKERNET.SEND] [810] [⚠️ ] - Not sending BunkerNet data because instance is not registered
scheduler.log:[2026-06-11 17:54:56 -0400] [BUNKERNET.REGISTER] [508947] [ℹ️ ] - No BunkerNet ID found in db cache, Registering instance on BunkerNet API ...
scheduler.log:[2026-06-11 17:54:57 -0400] [BUNKERNET.REGISTER] [508947] [❌] - Received error from BunkerNet API while sending register request : Internal server error
scheduler.log:[2026-06-11 17:54:58 -0400] [BUNKERNET.DATA] [508947] [ℹ️ ] - No BunkerNet ID found in db cache
scheduler.log:[2026-06-11 17:54:58 -0400] [BUNKERNET.DATA] [508947] [⚠️ ] - Not downloading BunkerNet data because instance is not registered
scheduler.log:[2026-06-11 17:54:59 -0400] [BUNKERNET.SEND] [508947] [ℹ️ ] - No BunkerNet ID found in db cache
scheduler.log:[2026-06-11 17:54:59 -0400] [BUNKERNET.SEND] [508947] [⚠️ ] - Not sending BunkerNet data because instance is not registered
scheduler.log:[2026-06-11 18:14:46 -0400] [BUNKERNET.REGISTER] [508947] [ℹ️ ] - No BunkerNet ID found in db cache, Registering instance on BunkerNet API ...
scheduler.log:[2026-06-11 18:14:48 -0400] [BUNKERNET.REGISTER] [508947] [❌] - Received error from BunkerNet API while sending register request : Internal server error
scheduler.log:[2026-06-11 18:14:48 -0400] [BUNKERNET.DATA] [508947] [ℹ️ ] - No BunkerNet ID found in db cache
scheduler.log:[2026-06-11 18:14:48 -0400] [BUNKERNET.DATA] [508947] [⚠️ ] - Not downloading BunkerNet data because instance is not registered
scheduler.log:[2026-06-11 18:14:49 -0400] [BUNKERNET.SEND] [508947] [ℹ️ ] - No BunkerNet ID found in db cache
scheduler.log:[2026-06-11 18:14:49 -0400] [BUNKERNET.SEND] [508947] [⚠️ ] - Not sending BunkerNet data because instance is not registered
```

In summary, the task failed to register due to:

[BUNKERNET.REGISTER] [810] [❌] - Received error from BunkerNet API while sending register request : Internal server error

and

[BUNKERNET.REGISTER] [514716] [⚠️ ] - BunkerNet API is rate limiting us, trying again later...

My location is Santiago/Chile

Regards

### How to reproduce?

N/A

### Configuration file(s) (yaml or .env)

```YAML
N/A
```

### Relevant log output

```shell

```

### BunkerWeb version

1.6.11

### What integration are you using?

Linux

### Linux distribution (if applicable)

Debian 13

### Removed private data

- [x] I have removed all private data from the configuration file and the logs

### Code of Conduct

- [x] I agree to follow this project's Code of Conduct

Start with /usr/share/bunkerweb/core/bunkernet/jobs/bunkernet-register.py and reproduce the registration using the DATABASE_URI and USE_BUNKERNET values shown. Review the scheduler.log registration failures and the BunkerNet API response handling. Done means the instance registers successfully, receives a BunkerNet ID, and scheduled registration/data jobs no longer fail because it is unregistered.

Written by the indexing model from the issue text.