MS Access Cannot Refresh\Connect

I have several processes using the "Read Access" operator which connect to MS Access databases on my local hard-drive which synchs with Google Drive. The processes have worked well over the last several weeks, but now several of the read access operators do not recognize the access databases. In the operator, I select the database file and attempt to refresh the table names but the tables do not show up in the list although I am pointing to the correct database as before. If I attempt to add the operator into this process and point to any access database, I still am not able to see any access tables. Bottom line is I cannot get to any of my access data thru Studio 8.2. Any ideas?