The crash message states:

Internal Exception: io.netty.handler.codec.DecoderException: java.lang.RuntimeException: Tried to Read NBT tag that was too big; tried to allocate: 2097180bytes where max allowed: 2097152

Version 1.3

Any help would be greatly appreciated. My PC is more than adequate to handle this modpack. I tried allocating my ram and this did not help.

Thanks.

I am also having this issue, as well as a huge delay when trying to log in.
I've used NBTexplorer to delete tags from the chunks with my main Drawer system in it, and sometimes this allows me to log in after huuuuge load times and getting kicked several times (timing out) but sometimes this doesn't work at all!
If I delete both chunks that contain my drawer system, it always always fixes it and I can log in, but I have no idea why this is happening and it's making my server almost unplayable.
It takes about an hour to get logged in whenever we want to play. Do any of the modpack creators know more about NBT data and analyzing NBT data? I could provide several different save files with this problem and outline the exact chunks where the issue seems to be located.

debug.log
Here is my crash log from this issue, when I reduce the max-tick-time to normal. When I have it at 10 minutes, I'm sometimes able to get the server to load, but when it's 1 minute (as normal) then this is the crash report I got.

This is also happening to me. If you want any logs ill be happy to supply them.

@Bad-SS @thardy01
Did both of you also have large drawer systems, and possibly have chunk loaders? I'm looking for commonalities we might have.