Problem with big .fit file from Tactix

Hi,

Last weekend when I took part in a big exercice race on bike the clock would not sync with Garmin connect. Later activities are syncing.

When I try to manually upload the file the site says that the .fit file is in a non recognized form. 

Is there any way to see if the .fit file is corrupt or is it a matter of size?

/P.A.

2024-06-14-22-02-01.zip