@erolsk8 – it seems, like the plugin runs into an error at some file, and keeps a wrong count for the remaining files. Once I clear the cache, the remaining count is one less before, and it runs either to the end or it hits another file that causes the above mentioned “[Media Sync] Attachment metadata could not be generated (wp_postmeta table).”.
At least with clearing cache I do have a workaround. 🙂
@kshines1 – I had the same error. This fixed it for me: Clear browser cache again, reload plugin page, rescan and then start importing. Unfortunately, for a couple of folders, I had to do this more than once.
Hey @erolsk8 – I just had the same issue. With 1.2.1 AND clearing the browser cache, it works again. Thanks!