Welp
- The cvar sm_joinleft_enabled does nothing.
- There is no version cvar.
- The plugin calls LogError("%N", client) when a client joins or leaves, this is not only totally worthless for logging but it will also fill the server's error logs with loads of garbage.
- On line 22 you might want to add an "ed" to your "Join".
-Edit:
Also your cvar "sm_joinleft_version" doesn't exist.
There are other plugins that already provide the same (and more) functionality than this one does.