My client will crash when I try to break any block, giving me a NullPointerException.
On a side note, Immersive engineering tells me my Java version is 1.8.0_25 when I have no other version installed than 1.8.0_165 (the latest verison).

First crash:
crash-2018-03-29_18.56.16-client.txt

crash-2018-03-29_18.56.17-server.txt

Second crash:
crash-2018-03-29_21.44.02-client.txt

crash-2018-03-29_21.44.04-server.txt

it's using 1.8.0_25 because it's bundled with the minecraft launcher. You have to tell twitch to use the old (JAR) launcher and specify that it use 165

That being said this is a duplicate report of #469 in that it refers to tesselating crashes that were not present before the 5.9.1 update, and that are currently still unexplained and intermittent.

I appreciate you taking the time to post logs and as of now I don't have any reliable advice for you to try. Re-download the pack as a fresh instance, update forge version and foamfix version and launch with the JAR launcher but even that is not shoing to be 100% sucessful (or its only a temporary fix)

Thanks for the tips, it seems the temporary fix works and I can play again <3

Duplicate.