Morph "Error: Access to clips not possible"

@jamieclarke Yes, now the morph effect works again. Thanks a lot for your help!

No, I use one monitor and have not updated Windows in the last days.

Thanks!

Issue:

I have nested two clips in a sequence, but when I want to apply the morph effect to a cut, I get the error ‘Error: Access to clips not possible’ every time. Until about halfway through my project, the morph effect worked perfectly without any problems, but now all of a sudden it no longer works. Since halfway through my project, the morph effect no longer works - even though I haven't changed anything. It worked all the time.
I have already reset the layout, completely deleted the cache of Premiere and After Effects, tried to use an older automatically saved version of my project, but the morph effect no longer works - each time I get the same error that the morph effect has no access to my clips.

Adobe Premiere Pro version number: 

25.1

Operating system:

Windows 11

System Info: CPU, GPU, RAM, HD:

I9 13900K, Radeon RX 7800 XT, 64gb DDR5 5600mhz, Samsung SSD 980 Pro 2TB

Video format:

MOV-422 10-bit LongGOP

Steps to reproduce:

1. Delete an unusable part of the video
2. Remove the resulting gap by merging both clips together
3. Drag the morph effect onto both clips to create a smooth transition
4. The window with the error ‘Unable to access clips’ shows up

Expected result:

Instead of the window with the error: ‘Unable to access clips’ the window ‘Analysing in the background’

Actual result:

The window with the error ‘Unable to access clips’ shows up

Thanks!