Hi, I haven’t tried the new client it myself yet, but I would start by checking:
-are the files stored locally, in the cloud only, or dowloaded one by one on demand?
-Have you entered a normal Windows path to the file location (like c:\blah\blah).
-Do NTFS permissions block URbackup client? (I really really doubt this, but you could try to temporarily assign everyone:full control to the root google drive folder).