[20:05:00] [Server thread/INFO] [STDERR]: [CoroUtil.util.CoroUtilCompatibility:isTANInstalled:62]: java.lang.ClassNotFoundException: toughasnails.season.SeasonASMHelper

I've been seeing a lot of output like that right after the world loads on my server.

More output here

I'm seeing the exact same thing. Using the latest Forge, the latest CoroUtil and the latest Weather2.

Seeing this same thing also, @Corosauce Any fix in sight for this?

Bump, also having this issue. Could be the possible cause why most of the time I crash when joining my own server.

@Brittank88 Whats your crash log? or what error does it give on disconnect...

I will give what I can in a moment but the issue is... there is none. Not on server nor client. it just says I disconnected for the server logs, and for the client literally no errors at all. I'll send the files or in a pastebin shortly.

For me, it does the same in server, but in the client it gives "An existing connection was forcibly closed by the remote host."

Oh my gosh, one of my client fml logs is nearly 10GB. I'm in the process of uploading to google drive now.

@CDAGaming Sorry for being so late in actually posting the link to the logs, but here it is:
https://drive.google.com/open?id=1SEsRdtkFX68Y--sQeqiQcWrtnaoVGgPW

As you can see if you find a text editor capable of opening very large text files, the client log just... ends.
The last line states that it is joining the server on it's IP and then... nothing.

Anyway, I'm going through and re-adding the mods bit by bit to determine what the problem file is (In this case it seems that it is not weather2 or coroutils, although it could very well be mods conflicting with it).

Catching up on backlog, had this fixed a while ago, all should be good now.