I might be on the wrong track (and have no experience with the Nano Every), but did you select the Nano Every (not the classic Nano) from the tools/boards menu?
Is this the first time that you tried the board or did it work in the past?
I might be on the wrong track (and have no experience with the Nano Every), but did you select the Nano Every (not the classic Nano) from the tools/boards menu?
Is this the first time that you tried the board or did it work in the past?