Normally support questions should rather go to the [mailing list](https://www.geany.org/support/mailing-lists/#geany-users) (or [IRC](https://www.geany.org/support/irc/)).

In any case, we'll need more information than "Geany reported errors". What is your OS, Geany version, etc?

A wild guess: you're on Windows, and you didn't install Python separately (Geany doesn't come with it), or the way you installed Python did not put it into the system's search directories so that the default Geany configuration can find it. In the latter case, you can either get Python into the PATH, or adjust Geany's Python [build commands](https://www.geany.org/manual/current/index.html#set-build-commands-dialog) to look in the right place.