[1.18.1] Unable to Connect to LAN Server

[PestoPosta]

I made a mod pack to play with my friend, everything was korsher for the first 4 hours or so.
Called it quits for the day, day two, get this error.

I originally thought it was Create related, rebuilt the pack without create, same result.
I am at a lose.
Happens in both 1.18 & 1.18.1

I've already tried all of the obvious solutions.
Restart, disable antivirus, mods should be as up to date as they can be etc. on both comps.

Launcher Log from the host.
https://gist.github.com/PestoPosta/5ce33273c21647931248dacaf2f6e598

Log file from the host.
https://gist.github.com/PestoPosta/bcaa2d33851d83479ff8f6e6480721a0
 

Launcher Log from joining comp.
https://gist.github.com/PestoPosta/e2157a4aef5b81fed149bc44394f4a2a

Log from the joining comp.
https://gist.github.com/PestoPosta/cbdae1706243e88b5db9364df86002e8

As always any help is greatly appreciated
and thanks in advance for any help rendered.
 

Edited January 5, 2022 by PestoPosta

[PestoPosta]

Issue still active.
Again any help provided would be greatly appreciated.

[PestoPosta]

SOS