I have more or less the exact same issue. Last week Garmin connect promted me to install updates for my forerunner 110, which I did. I was then prompted to install the new garmin express software which I did. rying to upload runs tonight and Garmin express says there is no data to sync?? When i try to upload via usb at garmn connect I get the TypeError: unable to set value of property 'display':object is null or undefined. Did either of you guys discover a fix for this?? Doing my head in, I have loads if runs I want to get uploaded!!
I'm having the same error code for my Edge 500. Yesterday it worked fine, today an error message. Strava is not recognizing my device either - however is it clearly visible as a mass storage device on my Windows vista computer. Any help appreciated.