Garmin Express won't login to sync with Garmin Connect - it keeps reporting "Re-authentication required". This has been on going for about 24 hours. My login details are correct I have checked them very carefully.
This used to be a common problem a few months ago but this problem seems to have mostly disappeared. I think a number of people ended up calling support. That's probably what you should do.
The error was caused by corrupted data in the Sync folder on the computer. However, if the activities on your device are corrupted, it may still give the re-authentication prompt. If you have a mass-storage device, try uploading them manually:
[URL="http://support.garmin.com/support/searchSupport/simpleCase.htm?caseId={b16302a0-02ac-11de-515b-000000000000} &kbName=garmin"]How do I manually upload data from USB Mass Storage devices to Garmin Connect?[/URL]
If you have an ANT Fitness device, try clearing the sync folder on the computer:
[URL="http://support.garmin.com/support/searchSupport/simpleCase.htm?caseId={b2320530-05f0-11e4-eaba-000000000000} &kbName=garmin"]How do I remove FIT files that fail to sync in Garmin Express from my computer? [/URL]
If you continue to experience the re-authentication prompt, contact Product Support by phone as we will need to gather more information.