@KristjanESPERANTO I did set the showModuleApiMenu: true,
I do get the “Module Controls” menu entry, but it has no content AND other notification based modules are working.
I noticed as well that the “Updates” doesn’t show modules, anymore. The only one shown is “MagicMirror”, below the message “!No module loaded.”

Ok, I renamed MMM-Remote-Contol directory and re-installed following the github instructions. All is working now!
Thank you for your help and a great module!