@jamesosborne Thank you for the clarification.
There were no attempt to configure setup on stage. Moreover, attempt to configure on production failed, because it constantly redirects to the stage after Sign-in.
After deleting plugin from the stage it is working. I’ll let you know next steps, I may use your help and share configuration details if problem returns with rebuilt stage.
@jb510 Thank you for your hints.
@jamesosborne I followed your guide and installed the helper plugin. Could you please confirm if correctly? Firstly, I installed and configured helper on staging environment (directing site address to prod), but it didn’t seem to change anything. I still got a loop directing to the stage.
Should the helper plugin run on staging wordpress or production wordpress, or even both?
Meanwhile, I decided to delete GSK from the stage, which solved the problem until next staging rebuild.