Unfortunately, most troubleshooting recommendations detailed on this support site are not applicable to players using NVIDIA's GeForce NOW service. For most issues, you will likely need to contact an NVIDIA's Customer Care agent instead.
FAQ
How long does it take for Unturned to update on GeForce NOW?
This depends on the size of the update. Just like other games on GeForce NOW, updates usually take a few hours, but could require much longer. Please be patient during maintenance/patching.
How do I fix the "Built-in resources mismatch" error?
Unfortunately, this type of issue—and any other issue involving corrupted game files—cannot be fixed with a game update. For GeForce NOW players, we recommend contacting an NVIDIA Customer Care agent.
What are the minimum requirements to use GeForce NOW?
Please visit their "System Requirements" page for information on hardware and internet requirements.