Everytime I shoot a bloof block with a bow and arrow it crashes me.

This is the crash report
crash-2020-07-04_17.28.45-server.txt

same crash here too.

This was fixed in the 1.16 port of the mod.
Unfortunately, Abnormal Mods will no longer be releasing new 1.15 versions of its mods.
If you still want to have this issue fixed you can go back to version 1.3.1 of the mod.