It's impossible to integrate a FIT file on the garmin connect application. The file appears corompu. How to do it?
See this file - fixed-2020-06-26-19-23-01.zip
Repaired with the FitFileTools section remover.
Also, check your device for available memory. Do you have Windows or Mac computer? If Windows, connect the Garmin USB cable to your Garmin and your computer and have a look at the Garmin\ACTIVTY folder. It's a good idea to periodically clean out the ACTIVITY folder after everything has been successfully synced with Garmin Connect. Alternatively, you can just move them off of your device and onto a secure location on your PC and/or network.