Fit File won't synch, can't upload and manual adding is not suffice

I need help - I just finished a strength training session and hit some amazing personal bests - I want those recorded in my file. Something happened that the watch won't sync it with the Garmin Connect app (android). I tried it manually to upload and I can't - there is an error message. Seems like it is corrupted.

However, I tried several tools online I found on this forum to be posted previously but none work. Now I tried to manually add a session but those are only for running or biking. 

Please help!

My file is:

https://drive.google.com/file/d/1p32kcEj9kqJiWjOpdfwcmlydWoqkRKtv/view?usp=sharing