Which version of RealityCapture are you using? If one since 1.4 version, are you running it through Epic Games Launcher? Is normal detail model finished? After this error do you have the options to resume model calculation? Is this happening for all your projects of just for some?
You can check also these posts with similar issues and some proposed solutions:
There are some general fixing methods which can help with this: restart, clear cache, reinstall drivers, clean install, different reconstruction settings