Trouble to download workouts

Hi I’m Jacopo from Rome.
I had trouble loading my workout this afternoon. I finished the workout and saved. Oddly enough, it wasn’t downloaded in Strava and Training Peaks. I did a further test and cycled for a few seconds, finishing and saving the lap. Still nothing. I tried the manual insertion (taking the file in the “Activities” folder) and the file is damaged “maformed”…so says Strava. Although the test run is finished, it is still “in progress activity” (this is the name of the file in “Activities folder”), but I finished about one hour and turned everything off. Can you help me?