Crash Report Help: Exception Ticking World

Hello. I'm new to being a server owner. I've recently encountered a crash report that has been consistently popping up using the same modpack. I have done a world reset and even a fresh install with a new world yet I still receive this crash report. I've attached the crash report. You can view it in the file or through this pastebin link: https://pastebin.com/Kn551KMB

I primarily want to know if there's anyway to salvage the server or do I just have to call it quits and not use this modpack. Thank you.
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