problem running stockfish

This is on a Linux machine.
Did you make sure the binary has the execute bits set?

Get stockfish working from the command line first.
Probaby "chmod +x stockfish"
Or it could be the binary you downloaded has the wrong CPU optimisations. Compling stockfish binaary yourself can be a big noob step, but it's worthwhile learning on Linux.

Did you resolve it? I have the same issue and I had compiled Stockfish 15 myself which works perfectly well from command line but somehow unable to connect to Scid. I will ignore the simplistic comments above and assume you have a perfectly working version of Stockfish 15, according to the programmers communications on Github it may be an problem with the GUI (Scid) engine connection: https://github.com/official-stockfish/Stockfish/pull/3678