Is your drive where you install games automatically mounted by the system? In case something changed in your system, does it have the same path as Steam expects it to? And is the drive a separated storage? And though it may sound like a stupid question, I think it’s important to ask also, are you sure it’s on the storage you think it is?
Doesn’t appear to have a RSS feed either, and doesn’t seem like Nitter supports it. 😔