Aternos keeps crashing on custom modpack

I made a customized modpack of around 80 mods to play with friends and it keeps crashing, can't figure out why, as no major errors appear in the logs.

Forge 1.12.2 (14.23.5.2855)

logs

I installed Llib and this time the log did actually show the missing mods, I will try to install them and close the thread if it works, thank you.

After installing the missing mods and trying again, it crashed without any missing mod messages or stuff.

logs

Fixed, buildcraft was causing trouble.

Got a new issue, aternos loads kind of okay, one out of five attempts on starting up works, while all other crash and the server ends up crashing after a few minutes.

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Would that also fix sudden crashes?