Running TES3MP 0.8.0, I get the following console output when a player joins:
[2022-02-11 22:53:46] [WARN]: Unhandled PlayerPacket with identifier 142 has arrived
[2022-02-11 22:53:51] [ERR]: [Script]: Error state: false
[2022-02-11 22:53:51] [ERR]: ./server/scripts/logicHandler.lua:679: bad argument #1 to 'lower' (string expected, got nil)
[2022-02-11 22:53:51] [ERR]: [Script]: Server crash from script error!
terminate called after throwing an instance of 'luabridge::LuaException'
what(): ./server/scripts/logicHandler.lua:679: bad argument #1 to 'lower' (string expected, got nil)