We've recently made a server with 67 mods but my friends have no been able to connect for the most part but I can with ease and very minimal disconnection. My 3 other friends have difficulties joining though and we don't know why, they have better specs and internet than me, and when we batch test our mods by 5-10 it works perfectly but somewhere along those they start to have difficulties logging into the world. We have a hard-time pinpointing because the bug is very inconsistent so we can't pinpoint which mod clashed with each other to cause this and I have very minimal expertise in reading logs.
We've recently added a mod called RandomPatches and the server no longer turns on.
Server log: https://mclo.gs/wHGRtbg
Client log of 1 friend WITHOUT/BEFORE RandomPatches: https://mclo.gs/sD0lUOf