Reason: Authority related problem
Solution: Restart the RPC service
Steps:
- On a Mac, press ‘Command’ + ‘Space’. Start typing ‘Activity Monitor’ in the Spotlight search box (the first few letters should show up) and press Return. After a moment, you will see the ‘Activity Monitor’ window.
- In the ‘Activity Monitor‘ window, select ’Memory‘, type ’RPC Server‘ in the search box, and force quit it.
- Restart and Enable RPC Service
If it still doesn't work, you need to uninstall and then reinstall CrealityScan, restart your computer, and then restart the RPC Server.