When starting my server I get this crash report.

https://pastebin.com/txXVdHwi

I’ve deleted the config file for loobags and even delete the mod itself and still cannot get the server running. any help please.

See I don’t understand why this has all of a sudden happened, the server was running for around a week just fine, then done it’s scheduled restart and now this error.

Edit: I remove the mod, run /fml confirm to confirm I still want to run the server, server hangs for around 5 minutes and crashes with same crash report.

Do you have a discord or something for easier communication? Thanks.

No I don't, this is pretty much the fastest way to contact me. Ultimately I cannot help much, I don't run servers so I have no idea why things suddenly break in them.
I'd probably copy the save data and set the server up from scratch.

It looks like the rareReward loot table isn't set up correctly and is adding the same pool twice. If you removed the mod and it still crashes, then it's definitely not caused by Lootbags. The problem is grounding through Lootbags because to generate the loot tables I have to create a fake world during load, and it might not be passing through all the necessary error handling to make such issues hide from view.
If I had to guess, rareReward is probably added from the questing mod or another loot table tweaker mod, so check those mod's config files.