I installed the same version of Apotheosis on both server and client, and when I tried to connect, I couldn't because the item registries didn't match.
When I opened the server with my personal PC, I had no problems, but when I opened it through the hosting site, or at certain times, this happened.
The item in the registry that doesn't match is an item called ender_lead.
I don't know what the exact cause of this problem is.
latest.log

make sure client and server have the same configs

Ah, That's a really simple issue! I thought it was a problem with the modes themselves when I saw "modes don't match". I have no idea what is causing this and have been at a loss all day. thanks so much for letting me know.