Hello, those files aren’t officially released, so it is really strange that you are getting such warning.
How were the used XMP files created? In RealityScan, the as rigs are considered only laser scans. The camera rigs functionality wasn’t implemented, but there can be some workaround: Capturing Reality Camera Rig - #2 by OndrejTrhan
You can check this regarding RealityScan’s XMP files: XMP Metadata Files - RealityScan Help
CUDA error shouldn’t be shown during alignment. I suppose this can be related to yours unusual XMPs. At least have you tried to update the CUDA driver?