Final Cut Pro 11 Magnetic Mask is not working as expected.

I have a 2021 M1 Max 16 inches MacBook Pro running macOS Sonoma 14.7.4. I have running Final Cut Pro version 11.0.1. But the magnetic mask is not working as it should be.

It is a 1920x1080P HD project at 30 frames per second on an external hard drive and 1.49 terabytes of free space on it. I have 64GB of RAM and 4.47 terabytes of free space on my Mac.

Earlier on i successfully used the magnetic mask to create a thumbnail from a still photo that stands out. I used a 3rd party plugin called RN mask glow and keyframes the colours. However, when I used the magnetic mask on another still photo, the progress bar, that is seen when Final Cut Pro is analysing goes to 99% and it is stuck like that until I have to force quit the application. It happens when I analyse either in the default way or just forward. This never used to happen before to me until now. When I restart the application and do the same magnetic mask analysis I get the same result. I deleted the Final Cut Pro 11 preferences by holding option + command while opening the application but it is still not going to work. It is still analysing at 99% for 3 hours now.

Should I uninstall and then reinstall the application?

Just reaching out to clarify if anybody else has experienced the same issue please?

Thank you in advance.

[Edited by Moderator]