Not sure why it's crashing myself but i would rather report it just in case.
Using alpha-3 for the 1.17 version of requiem, single player works fine.

java -version gives me
openjdk version "16.0.1" 2021-04-20 OpenJDK Runtime Environment Microsoft-22300 (build 16.0.1+9) OpenJDK 64-Bit Server VM Microsoft-22300 (build 16.0.1+9, mixed mode)

latest.log

Ah, that was a very stupid error on my side. Will definitely be fixed for next alpha.

I can confirm this fix is working but for some reason we are unable to use the disassociation to leave the possessed body but we can work around that. ty!

That part is normal unless you are talking about a golem - you need the Emancipation status effect now