twiikuuaiera
I assume that your server is running on Windows, some of the recent additions assume Linux (sm_prevent_respawning, sm_fix_reflect_self_damage, sm_grounded_rj_resistance), and that's because I decided to stop supporting Windows (it's incredibly time consuming to find function signatures and it's a dumb operating system to use for server work).
However, I can update the plugin so that unsupported features aren't loaded on Windows, so that it doesn't immediately crash. I'll try doing that later today, no promises :)
E: v1.14.0 should work immediately on Windows
Thanks as rgl requires the plugin but doesn't specify that Linux servers are required. Thank you so much Twiikuu!
edit: it works!