I removed the controller ( errors stopped )
when placing it down again, the errors come back
placed it somewhere else, not connected to any cables. errors don't care and spam the log.
I put this "corrupt" controller in a chest and built a new one. errors like that one just as much as the "corrupt" one and spam the log.
Placing the controller somewhere, where it doesn't have power results in no errors. but that doesn't help
also, when I click the controller, I get another error "Failed to open GUI" ... and the gui doesn't open :D