P: Blank thumbnails in Photoshop style panel

All my style presets have turned into blank thumbnails. They work and (probably) do the thing they were set up to do, but I no longer have a reference point for which is which! Also, my library stopped synching new styles a few weeks ago and I haven't had a chance to figure it out. Is this realated and how do I get the thumbnails back?? (i reset preferences and reinstalled etc.).  By the way, I'm using the Beta version primarily but have both installed as they like to take turns working on my M1 :).  The problem appears to be affecting both applications. Screenshot below. (Also, somewhat urgent as I do use the program everyday for work and rely quite heavily on the presets I've developped to get my work done quickly...I am now blundering through my workflow...)