Schema Registry does not work

[MaybeIknow]

Hello,

starting a few weeks ago our AKHQ can no longer access the schema registry. When trying to display the schema list or a single schema, we get an 404 error. We cannot locate the problem. Can you assist us with that?

On the Schema Registry page:
Internal Server Error: io.confluent.kafka.schemaregistry.client.rest.exceptions.RestClientException: HTTP 404 Not Found; error code: 404

Trying to display a single schema:
HTTP 405 Method Not Allowed; error code: 405

The messages inside the topics get deserialized correctly and the schema ids are shown. So there seems to be some kind of communication to the registry.

Thanks in advance