In case anyone been hit by this and wondering whats going on.
Google has very helpfully revoked all older widevine versions, and their newest binary does not work with the glibc that osmc and (apparently) rasberypi is uses.
So busted as it were. My 2G RPI4 stopped playing DRM content.
Not sure what the easiest and most expeditious way around this.
If anyone has found distributions or more convenient ways around this please add your suggestions of what works.
Might have to swapout my RPI4 for an old Laptop, which I have temporarily setup.