Crash When Trying to Find a Blueprint Class with Niagara Particles
Found in 4.20 CL# 4369336, 4.21 CL# 4753647, 4.22 CL# 6574378, 4.23 CL# 6599617
Crash as soon as you press PIE
No Crash would occur
There's no existing public thread on this issue, so head over to Questions & Answers just mention UE-74988 in the post.