"There was an error syncing with Garmin Connect"

I just tried an uninstall and reinstall, still the same issue.

Have exactly the same issue with an Edge 800. Tried the same solutions but no joy.

I have since been able to try on an old laptop which hadn't been updated to Express 7.24.0.0 and the sync worked perfectly.

Looks to me like it is a problem created by the update for my older hardware.

Rang UK tech support but operative was not able to assist. Transfer to "bike" team failed & line was dropped.

Wasted nearly an hour and gave up!

Guess we can await confirmation of fault from others who are still using the older gear but not holding my breath for a solution.

I am also experiencing the same error with my Edge 800 when trying to sync with Express 7.24.0.0.  A different computer still running Express 7.23.0.0 continues to function normally.

Same here, my wife can't sync her Vivosmart 4. 

But my Venu 2 and Edge 830 sync.

I have the same problem with my EDGE 305. Didn't find how to fix it. Anyone know how to solve it?

Same issue with my EDGE 305- Still try to find how to fix it. Anyone know how to solve it?

Unable to get my older devices to sync via Express, though they appear to connect OK & check for updates which no longer exist.

So don't have an actual "fix". However, the work around is to manually upload from GPS device directly into Garmin Connect (using Upload or Import Activity at top of page). All my activities have uploaded perfectly completely bi-passing Express in this way.

Thks for your feedback. I extracted the activities from my EDGE 305 using Base Camp and then, uploaded the activities manually at Garmin Connect!