az functionapp config container set fails

### Describe the bug

I am unable to set a container image to function apps using Azure CLI. The function app is under "Container Apps Environment". I am able to do the same using portal, just that it won't work in CLI. The error is "Internal Server Error", doesn't provide much information as well.

### Related command

az functionapp config container set --docker-custom-image-name .azurecr.io/:4338e0ec91f0bb3216e4 --docker-registry-server-password --docker-registry-server-url https://.azurecr.io --docker-registry-server-user --name --resource-group

### Errors

Operation returned an invalid status 'Internal Server Error'
Content: {"Message":"An error has occurred."}

### Issue script & Debug output

urllib3.connectionpool: https://management.azure.com:443 "PUT /subscriptions//resourceGroups//providers/Microsoft.Web/sites//config/appsettings?api-version=2022-03-01 HTTP/1.1" 500 36
cli.azure.cli.core.sdk.policies: Response status: 500
cli.azure.cli.core.sdk.policies: Response headers:
cli.azure.cli.core.sdk.policies: 'Cache-Control': 'no-cache'
cli.azure.cli.core.sdk.policies: 'Pragma': 'no-cache'
cli.azure.cli.core.sdk.policies: 'Content-Length': '36'
cli.azure.cli.core.sdk.policies: 'Content-Type': 'application/json; charset=utf-8'
cli.azure.cli.core.sdk.policies: 'Expires': '-1'
cli.azure.cli.core.sdk.policies: 'Strict-Transport-Security': 'max-age=31536000; includeSubDomains'
cli.azure.cli.core.sdk.policies: 'Server': 'Microsoft-IIS/10.0'
cli.azure.cli.core.sdk.policies: 'X-AspNet-Version': '4.0.30319'
cli.azure.cli.core.sdk.policies: 'X-Powered-By': 'ASP.NET'
cli.azure.cli.core.sdk.policies: 'x-ms-failure-cause': 'service'
cli.azure.cli.core.sdk.policies: 'x-ms-ratelimit-remaining-subscription-writes': '1199'
cli.azure.cli.core.sdk.policies: 'x-ms-request-id': '7d1eeaf6-1d3d-4aa8-ab54-143b6422f61c'
cli.azure.cli.core.sdk.policies: 'x-ms-correlation-request-id': '7d1eeaf6-1d3d-4aa8-ab54-143b6422f61c'
cli.azure.cli.core.sdk.policies: 'x-ms-routing-request-id': 'WESTUS:20240107T210608Z:7d1eeaf6-1d3d-4aa8-ab54-143b6422f61c'
cli.azure.cli.core.sdk.policies: 'X-Content-Type-Options': 'nosniff'
cli.azure.cli.core.sdk.policies: 'Date': 'Sun, 07 Jan 2024 21:06:08 GMT'
cli.azure.cli.core.sdk.policies: 'Connection': 'close'
cli.azure.cli.core.sdk.policies: Response content:
cli.azure.cli.core.sdk.policies: {"Message":"An error has occurred."}
cli.azure.cli.core.azclierror: Traceback (most recent call last):
File "/usr/lib64/az/lib/python3.9/site-packages/azure/cli/command_modules/appservice/custom.py", line 464, in update_application_settings_polling
_generic_settings_operation(cmd.cli_ctx, resource_group_name, name,
File "/usr/lib64/az/lib/python3.9/site-packages/azure/cli/command_modules/appservice/_appservice_utils.py", line 33, in _generic_settings_operation
return operation(resource_group_name, name, setting_properties)
File "/usr/lib64/az/lib/python3.9/site-packages/azure/core/tracing/decorator.py", line 78, in wrapper_use_tracer
return func(*args, **kwargs)
File "/usr/lib64/az/lib/python3.9/site-packages/azure/mgmt/web/v2022_03_01/operations/_web_apps_operations.py", line 18341, in update_application_settings
raise HttpResponseError(response=response, model=error, error_format=ARMErrorFormat)
azure.core.exceptions.HttpResponseError: Operation returned an invalid status 'Internal Server Error'
Content: {"Message":"An error has occurred."}

During handling of the above exception, another exception occurred:

Traceback (most recent call last):
File "/usr/lib64/az/lib/python3.9/site-packages/knack/cli.py", line 233, in invoke
cmd_result = self.invocation.execute(args)
File "/usr/lib64/az/lib/python3.9/site-packages/azure/cli/core/commands/__init__.py", line 663, in execute
raise ex
File "/usr/lib64/az/lib/python3.9/site-packages/azure/cli/core/commands/__init__.py", line 726, in _run_jobs_serially
results.append(self._run_job(expanded_arg, cmd_copy))
File "/usr/lib64/az/lib/python3.9/site-packages/azure/cli/core/commands/__init__.py", line 697, in _run_job
result = cmd_copy(params)
File "/usr/lib64/az/lib/python3.9/site-packages/azure/cli/core/commands/__init__.py", line 333, in __call__
return self.handler(*args, **kwargs)
File "/usr/lib64/az/lib/python3.9/site-packages/azure/cli/core/commands/command_operation.py", line 121, in handler
return op(**command_args)
File "/usr/lib64/az/lib/python3.9/site-packages/azure/cli/command_modules/appservice/custom.py", line 1783, in update_container_settings_functionapp
return update_container_settings(cmd, resource_group_name, name, registry_server,
File "/usr/lib64/az/lib/python3.9/site-packages/azure/cli/command_modules/appservice/custom.py", line 1761, in update_container_settings
update_app_settings(cmd, resource_group_name, name, settings, slot)
File "/usr/lib64/az/lib/python3.9/site-packages/azure/cli/command_modules/appservice/custom.py", line 438, in update_app_settings
update_application_settings_polling(cmd, resource_group_name, name, app_settings, slot, client)
File "/usr/lib64/az/lib/python3.9/site-packages/azure/cli/command_modules/appservice/custom.py", line 477, in update_application_settings_polling
raise CLIError(ex)
knack.util.CLIError: Operation returned an invalid status 'Internal Server Error'
Content: {"Message":"An error has occurred."}

cli.azure.cli.core.azclierror: Operation returned an invalid status 'Internal Server Error'
Content: {"Message":"An error has occurred."}
az_command_data_logger: Operation returned an invalid status 'Internal Server Error'
Content: {"Message":"An error has occurred."}

### Expected behavior

Sets a container image to the function app

### Environment Summary

azure-cli 2.55.0

core 2.55.0
telemetry 1.1.0

Extensions:
ai-examples 0.2.5
ml 2.22.0
ssh 2.0.2

Dependencies:
msal 1.24.0b2
azure-mgmt-resource 23.1.0b2

Python location '/usr/bin/python3.9'
Extensions directory '/home/sridharan/.azure/cliextensions'
Extensions system directory '/usr/lib/python3.9/site-packages/azure-cli-extensions'

Python (Linux) 3.9.14 (main, Oct 12 2023, 19:48:32)
[GCC 11.2.0]

Legal docs and information: aka.ms/AzureCliLegal

Your CLI is up-to-date.

### Additional context

_No response_