I have this exact issue, but i'm not sure that this mod has been updated since the aberration release, so I have unistalled it from our server until an update. Would be interested in hearing if there is a fix though.

It did NOT crash me on any Island SE Aberration Ragnarok or Crystal Isles map. But starting 1 Jan too, it crashes the server, even tho this mod has no update, something else broke it.

Technically it seems to shut down server or make it poof, but I dont get a crash error or any log on server side, just as if I shut it down.

^

Oh, sorry, I found the issue on 1rst troubleshooter I tried, (as its not server related crash, it doesnt appear in server logs) which is deleting ACM's profiles/save folder (as well as ACM itself and redownloading on server side just to be sure). Apparently new year messed up something for some people xD

More exactly:
1rst: On ASM if you use it, simply click "Open servers installation folder", and/or just go to ...\ShooterGame\Saved
2nd. Delete folder "SavedGames" (make sure its NOT "SavedArks" that is the save with your entire map, players and tribes data !), opening it beforehand you see it only has ACM inside.
3rd, add ACM again in MOD IDs (if you removed it since it didnt work) and run ! Fixed it for me.

My second troubleshooting guess was purging unused mods (as I tried out many but then removed from server, doesnt remove the actual mod data though! ). Was not needed in my case, but maybe helps anyway.

Is there a way to fix this. Ive tried everything and my game keeps crashing when i start up acm.

@MichaelSeph's way worked i've tried it myself.

ive tried it also but it still crashes my server.

Same issue here, used to work perfectly fine before. No changes have been made to the server.

Today I started our server and the same behavior happened all three times. When I finish booting the server, then log in, I initiate the authorization so that ACM can authorize. It says success, download required, and the second the download starts our server silently crashes (the server and client are on the same machine). This has never happened before.

I deleted the autogen folder and the ui folder again on both my client and server and that resolved the issue for me.