I use the manual upload functionality in garmin connect to upload my activities.
Until now this worked as expected but since today it doesn't work anymore. My last successful upload was on Oct. 9th.
The user interface always shows me the message "An error occurred with your upload. Please try again.".
I already cleared my browser cache and even tried to upload from a different browser.
A quick analyse of the sent request showed me that the response to my upload is a "HTTP Status 599 - Too Large" error with a description of "Cannot find message associated with key http.599".
Can it be that garmin changed the upload service but didn't change the manual upload form?
I attached one of the tcx files that doesn't work for me.
Thank you for every help!