[Deji]

The function has to return a value. Look at your code and think... does it return a value in every situation?

No, if gPlayerTeam[playerid] == -1 doesn't evaluate to true, nothing specific is returned. The function is returning an undefined value, hence the warning.

Код:

        return 1;    // either move this..
        }
        // .. here, or put another return here, if you want to return something different
}

Refer to the wiki for information on the return value: https://sampwiki.blast.hk/wiki/OnPlayerRequestClass
0 being returned will reject the spawn attempt.