Since I added rftools, and it's dependencies, it has been crashing on startup due to "exception in server tick loop".
Pastebin of crash log: https://pastebin.com/kiHuf61Y

Forge version: 1.10.2 - 12.18.3.2422
rftools version: rftools-1.1x-6.12.jar

I can't open that crashlog but did you install mcjtylib and compatlayer and if yes what version

I did. for some reason, mcjtylib required me have two versions for 1.10.2. I had 1.10-2.2.0 and 1.1x-2.4.3. The compatlayer version was 1.10-0.2.9.

also here's the crash:

https://pastebin.com/c43XFSWu

hopefully that pastebin will stay since I made a pastebin account now

Whenever I would have just 1.1x-2.4.3, it would say I needed 1.10-2.2.0. whenever I would have just 1.10-2.2.0, it told me I needed a higher version. I also treid 1.1x-2.3.10

Here's the client side crash log as well:

https://pastebin.com/avt9EPEW

You have the wrong version of McJtyLib. You must just the 1.1x versions. Don't use the older versions