[Crash]: RFTools/McJtyLib CTD

[squuig]

• What version of University: 1.1 (I had not updated to 1.1.1)
• Have you added any mods: No
• If yes, which mods: No
• Crash report link (preferably Pastebin etc, not the file): https://pastebin.com/3awaixiy https://pastebin.com/4eZgBPGs https://pastebin.com/1XYmkVbY https://pastebin.com/ihTpx7yF https://pastebin.com/kDYWai9u
• What were you doing when the crash happened: Was in Nether after working with Mahou Tsukai for a while. Started getting some lag like I was running out of memory so I figured I would return to the main menu and open it again but the crash happened when I quit from the world. Tried rebooting MC several times, none of which worked. Reinstall did not work. Have not reboot my PC but I will try after posting this.
• Any other details: Lists McJtyLib and RFTools as the source of the problem but, to my knowledge, I have not interacted with either of those mods in any way. Pastebins are ordered from most recent to the first crash. They may all be the same but I think I remember getting different crash reports, at least between the first and the last one. Sorry if that's annoying.

[squuig]

Stopped acting up when I started launching with FTBA instead of MultiMC. Unfortunately https://github.com/FTBTeam/FTB-University/issues/17 still seems to happen and I have to retry launching a couple times.