Not exactly sure what the red text in your image is stating, but assuming the file is corrupt or otherwise not formatted correctly for Garmin, and you've already tried this - How Do I Manually Upload an Activity I Recorded to Garmin Connect?
Attach the file here so we can attempt to repair it for you
Please, see in the attach
I don't see any attachment. Only a screenshot.
No access. Make the link public or respond to my request in your email.
I made. Could you please see / download my file?)
This will work - 2024-03-08-17-10-48-fixed.fit
Fixed using Fit File Repair Tool
To help minimize the occurrence of corrupt fit files sync your device then remove all activity fit files from your Garmin device using these directions - Removing Recorded Activities on a Garmin Fitness Device
Oh my God, it's incredible!!! Thank you very much for your support! I didn't really believe, that I could restore this file. I'll pray for you