Yeah I’m also seeing this across multiple projects that use steam or have a few c++ modules/plugins. Seems like the stack size was reduced between 5.4 and 5.5 or something recursive is happening due to the ue5.5 include order? It’s taken me a bit to hunt so I’m not really sure atm what the actual cause is. I’ve seen post on source discord, VRE, oculus start and other forums about it thus far. All the same with pie and standalone running fine yet shipping throws a fatal error with callstack overflow …. To clarify this is happening in 5.5 release as of this post.