Pr 24.3.0 dynamic link stopped working

Hi there. I am using 24.3.0, on the same kind of projects that I've been working for a year -it's a recurrent thingie-
I had some DL problems in the past; God and Adobe know that Dynamic link is a far cry from perfect, and some distance from fully functional. But this is chaos.
I do the same old "replace with AE comp",  go to AE, repeat the same background replacing and text overlying as I've done all 2023, and as soon as I go back to Pr, I have red bar over the clip, can't even see a still frame, no more playback on Pr or AE, nothing else works and the only way out is pre rendering 2005 style or moving on to Da Vinci Resolve.

What I've done:
- Cleared Cache.
- Started over on a fresh project, both Pr and AE.

- Checked SSD integrity and video files integrity.
- Cleared preferences.
- No errors.
- Everything else in the computer works flawlessly.

AMD Ryzen 7 5700x, 64GB RAM, AMD Radeon 6770 12GB VRAM DDR5, dedicated SSD for Adobe Cache and projects, all media on NVMe, win 10Pro, all Adobe updated.

Is there anyone else with a workaround? I really wouldn't like to ditch Adobe Creative Suite after 30 years of using Adobe software, but deadline looms in the horizon and I look more and more f'ed up every day.

Thanks y'all in advance!