a fatal error has occurred this connection is terminated

[Budninju]

I got this error when trying to load into a single player world or server. I was using a custom modpack that I made. The game did not crash it just said the error then went back to the main menu.

 

Here is the log: https://pastebin.com/gqahmJWJ

[MDW01]

If you had read the crash report you would have seen:

Quote

[main/INFO]: [CHAT] [Immersive Engineering] §4Warning: §rYour Java version is 1.8.0_25. This version causes crashes with the Engineer's manual. These crashes are close to impossible to fix for us. You can prevent the crashes by installing up-to-date Java (make sure to use Java 8, not Java 9) and forcing your launcher to use it.

 

Follow that advice if that doesn't fix it try removing Journey Map.