Unable to edit server properties Extension backend error - cannot read properties of null (reading 'rsp')

This error message usually indicates that there is an issue with the server or the API that is being used. Here are a few steps you could try to resolve this issue:

1. Check if the server is running properly and if there are any errors in the server logs.

2. Verify that the API is functioning as expected. You could try calling the API directly from a tool like Postman or cURL to see if it returns the expected response.

3. Ensure that the server and API are properly configured and that all necessary dependencies are installed.

4. Check if there are any network issues that might be causing the error. You could try running a network diagnostic tool to check for any connectivity issues.

If none of these steps help, you may need to consult with the server or API developer for further assistance.