Open the Windows Start menu and type Windows Security to open.
Click on Virus & threat protection on the left action bar. and scroll to Ransomware Protection on the right side of the screen.
Click Manage ransomware protection. and click the toggle button to turn off the Control folder access option.
Click Yes to confirm the change, if prompted. And see if this resolved the issue with Acronis software.
Please try to change the location of the Temporary files, Backup Project file, and Default project to other non-one driver folders, and restart Filmora.
If the issue persists, please send log files and an issue recording video to our support team along with a description of what you have tried before, and we will gladly assist you further!