Technical Problem Not Allowing Google Drive Scan to Complete

Hi. I hesitated buying CC Cleaner Pro because during trial the program could not finish the scanning of my Google Drive for duplicates, which is the major reason I wanted to use this program. I contacted support, but did not get an answer and my trial ran out. So…risking it again to get this fixed. It starts to scan my Google Drive, runs for a very long time, then says Technical Problem. I have tried the troubleshooting suggestions, but so far nothing has worked. What would cause this? How can I fix this? Thank you!