Mod biggerreactors requires phosphopyllite 0.4.0 or above, and below 0.5.0. Currently is 0.5.0

0.5.0 was installed by installing Bigger Reactors. Dropping back to 0.4.5 crashes the mod.

Sorry, a version number would probably help, eh?

Version biggerreactors-1.16.4-0.4.3.jar (Release)

BiR 0.4.3 and Phos 0.4.5 are known to work together fine, do you have performant installed?

No performant installed. There are beta updates for BiR in the file versions though. I have CurseForge set to only update to releases so I only see them when I look for them. Since it must be something on my end, I upgraded to the latest beta and it loaded fine.

I would mark this up to something on my end.