Trueimage slow open of backup

I am using Trueimage 2025 to do weekly incremental backups to a NAS from two Windows 11 PC's on the local network.

If I try to open the backup file of PC 1 on that computer, it takes a very long time to show the different increments, then much longer to see the files. It also opens an additional Window with the title "Please locate the last volume of the backup." in which a file name can be entered. But that doesn't seem to do anything.

If I open the same backup file on PC 2, the result is instantaneous, as expected. Opening the PC 2 backup file on either PC works as expected.

Any ideas?

I used TI for years but it's been many many moons go so I can't state a solution for TI explicitly. I would troubleshot it as I would any other application that wasn't acting like it was supposed to.

Make sure you have no corrupt system files that is causing this problem. Open a command prompt as administrator and type sfc /scannow
Pay attention to the output at the end of the scan to see if any system files were fixed or unable to be fixed.
Perform a clean boot to eliminate software conflict causing the issue. If it doesn't happen in a clean boot, you have some software conflicting with Windows. Brink's procedure will help you weed out which one. Perform a Clean Boot in Windows 11 to Troubleshoot Software Conflicts Tutorial
Uninstall the app using Revo Uninstaller Free. There is an installer and a portable version. Run it as admin. Be sure to check all the boxes of any leftover files and delete them. Restart and reinstall the TI program. Download Revo Uninstaller Free - Remove unwanted programs easily