Need Help With My Private Server

Hello everyone
I have my server up and running but I'm facing a problem that the titles in game doesn't work, I can't use any titles or open the title menu and I can't find out why, if anyone has an idea of which part of the files is responsible or would like to have a look at it for me I would really appreciate it!
Thanks a lot in advance!

Hi,
your SubHelper seems to be the problem if you cannot click on the item in your inventory to activate them.

You should check that part of your server again :)