That error happens when there is a desync between the client, and the server. Do you have the same version of the mod installed on your minecraft instance?

maybe let me check

Hmm, not sure what the issue is in this case.

That error happens when there is a desync between the client, and the server. Do you have the same version of the mod installed on your minecraft instance?
its still saying that

Could it be another mods fault

Possibly, although I've only seen this happen when the mod is missing on the client, or when there is a version difference.

these are all my mods

What about your mods folder on your computer? That's the aternos server mods list I believe.

here

damnnn

I would try restarting the server, and your game just to see if one of them didn't load mob origins for some reason.

i figured it out maybe

Gonna close, as I assume this is fixed, and the mod has received a major update.