A couple reasons that's could be preventing you from submitting yours score:
The deadline has passed. Verify the time zone of the workout deadline you're trying to submit
Are you logged in with the correct account. (Tip: Your login is the same email you registered with, and where all communications have been sent to)
If you're on a team, are you the team captain?
Do you have multiple accounts and are you logged in the correct account? Verify you're in the correct account by going to https://competitioncorner.net/editprofile and double check your email address.
Still having issues, ping us in the chat.