Avid Media Composer error Exception: ADM_PLAY_NOT_ARMED

Hello,
Media Composer shows up today with this error, for no reason. It worked fine until now when some settings were changed last night when I turned off my PC. Now I don’t think that might cause the error, but still…So can anyone help me to fix this error please without reinstalling the program please?
Thanks!

Avid Media Composer
Exception: ADM_PLAY_NOT_ARMED
