Why so many issues, please can someone help me

I have recently started a minecraft server and all i have are problems, here is the list:

1 : /spawn command turns sideways when used
2 : prefixes of names do not seem to work
3 : I CANT GET WARPS TO WORK
4 : Once opped you get all commands but you cant even use /rules when deoped
5 : Whenever i add a plugin i always get internal error when i use the command
my console has thousands of errors.
6 : /home has randomly stopped working
7 : When joining the server the player is not sent to spawn
8 : When using lwc it says click to loc but then nothing works
9 : When using creative gates i click the gate but no response

Please can someone help me i really need someone to just help me fix this and maybe even teach me how to use permissions without this many issues