I have been trying to figure out whats causing this crash to occur.

I have a minecraft server setup and my daughter can log in on her laptop and play all day without a single crash. If I am logged in and playing on my laptop and she attempts to log in it crashes.

If she is logged in and I log in she crashes. She can be logged in playing by herself with no issues all day.

I have 3 other people that play on the server and there are no issues. I can play with them and they can play with her. But we crash each other. I am so confused.

I have attached a log file from the crash. Any help would be hugely appreciated.
crash-2018-08-14_17.13.35-client.txt

This is actually a crash in some error handling i have for CCL, CCL can catch exceptions thrown whilst rendering another mod's block, there seems to be some quirks with method reference lambdas in java. Also i have no idea why you opened this on the ChickenChunks repo.. Anyway, TheCBProject/CodeChickenLib@25929ca should fix it, pushing an immediate release.

Sorry I saw CodeChicken and just thought this would be the right place. I really appreciate you taking the time. Its something me and my daughter started and she is so excited!