Matthieu Aohzan from Claranet France did an updated integration for Polar in Home Assistant to resolve the issue that it did not work with newer Home Assistant versions

https://github.com/burnnat/ha-polar/issues/16#issuecomment-1358434089 We received his message today. We are very happy about Matthieu Aohzan update and highly appreciate his contribution. Matthieu works for Claranet France. The Claranet Group Ltd. is an independent, European company and acts as a managed service provider for hosting and network solutions for medium-sized and large companies. The Claranet Group operates a …