🐛 API Handle Error on Stake Address Validation During dRep Registration

### Area

Other

### Domain

preview.gov.tools

### Which wallet were you using?

_No response_

### Context

While attempting to register as a dRep, I encountered an issue when entering my stake/payment address. The console and network logs display a 406 error when fetching data from:

👉 API Endpoint: https://preview.api.handle.me/handles/address


### Steps to reproduce

1. Connect your wallet.
2. Navigate to the dRep registration form.
3. Enter a valid payment address.
4. Check the console or network logs for errors.

### Actual behavior

- The API request to fetch handle data results in an error, even though the address is valid:

**API Call:**
https://preview.api.handle.me/handles/addr_test1qq4gcrw0m6cvltwgdu8erz5slesf3taljssugvc6qskwjd59z7klhrz62z5n53salsurrxc62qw7hkadfwt5p88hxw3sante48

- The API returns an invalid response, but the UI does not display any error message.

- Additionally, multiple console errors appear whenever the payment address is updated.


### Expected behavior

- The payment address validation should work without errors.
- The UI should properly handle API failures and provide clear feedback to the user.