MOGRTS are loading in Premiere Pro with color bars

Greetings, 

I am a finishing editor for a small company and have worked with multiple AE designers and artists on the same project for a client. Last year (2023) the client had rebranded their look and provided us with AE projects so we can rebuild the graphics that our studio uses for their specific needs. That said, we successfully recreated everything we needed until now. The majority of the graphics were made into Mogrts by us, so that I can change copy and adjust positioning on the fly for 16x9 projects.

Now we have taken those same graphics and created social sizes (1x1 / 9x16) to use for social clips that they require. 

Unfortunately, once I import the mogrt and drop it into the timeline, it seems that the precomp.mov file does not load properly and displays color bars instead. Everything else, controls, animation, etc looks fine. 

I am currently on an imac with Monterrey 12.3.1 using current Premiere Pro (2024) 24.3.0 and After Effects (2024) 24.3.0. The mogarts were also created in AE 2024 24.3.0

Can anyone help me trouble shoot this??  Many thanks in advance.