Server Stuck on Unloading server config for ''Mod Name'' When I try to stop it

[houlss]

I'm making a modded server, with 300 mods. The server works like a charm but when I try to stop it I get this issue. Is this a big problem that can break my game? Can I still play it with this error? How can I fix it and would my world get corrupted from this?

My modpack is an edited version of the modpack called BetterMC. I'm only playing with my gf, so 2 players. I think it could be because of the server configs of BetterMC's serverpack, since I deleted some mods from the original modpack. Is there a way to detect the configs that are causing this problem so that I can get rid of them?
Here's a photo of the error:

[github-actions]

👋 We use the issue tracker exclusively for final bug reports and feature requests. However, this issue appears to be better suited for either a discussion thread, or a message on our discord server. Please post your request on one of these, and the conversation can continue there.