Since Saturday, I have stopped receiving emails about the next turn being available.
regards
Hmm, have you checked spam? Nothing’s changed that I know of on my end, I’ve still been getting my turn emails, and it seems like emails in general are still being sent.
Nevermind - I found what happened - we have a job that synchronizes data with steam, and your account must have had something updated recently, and there was a bug in the job that I added when I was doing some refactoring a couple weeks ago that effectively wiped out the email address. 
Sorry about that, should be fixed now, please re-enter your email address in the UI. Thanks for the report!
Didn’t think to check that, but yes I added an image to the Steam profile.
Thanks for your help.