Got the error pictured below in screenshot just after updating Garmin Express this morning after being prompted to do so. The watch is a 965 I've had for a week and has been syncing just fine.
The fix for this described at https://support.garmin.com/en-US/?faq=GiLICKFtvE1nV5uq9diX89
Doesn't work because there is no FIT_TYPE_4 subfolder in the PendingSyncUploads folder. And the error won't go away.
Any pointers/advice/similar experience?
UPDATE: after resetting the watch using the 15 sec press, I am getting a different error: "There was an error syncing with Garmin Connect" as per second screenshot. Deep joy, takes me back to when this used to happen regularly a few years ago ...
UPDATE 2: and now getting a new error: "Some files could not be sent to your device." with "install-app" (Transfer Error)" in the dialogue box, as per the third screenshot below.