When clicking Tools / Check for Updates I get the following error message:
Unexpected error trying to determine the latest version available. Make sure your installation has a connection to the internet; <Fault -32500: 'RuntimeError: PyPI no longer supports the XMLRPC package_releases method. Use JSON or Simple API instead. See https://warehouse.pypa.io/api-reference/xml-rpc.html#deprecated-methods for more information.'>
Version is 4.8.3 (Docker), but the error also occured in the previous 4.8.2 release.