Please type any error messages, keywords, questions, etc. in the forum search and/or search engines before creating new topics. There is an existing topic. Please use it.
https://forums.whonix.org/t/templates-incorrectly-think-theyre-not-connected-to-a-whonix-gateway
Also please make sure you have upgraded to Whonix 13.
And when this persists in Whonix 13, please add your Whonix version number to your question.
Thread closed.