I get this same error in 4.26.2 when building reflection captures for my level… Using 2x RTX 3090s in nvlink… 24gb ram each … This is a major bug in the engine and I can see it has never been addressed.
I tried migrating to a video game type project… nad it worked for building the level and its reflection captures only one time… it then went to being broken again and crashes with this error just for building reflection captures alone.