Yes: the application with the blue icon is blocked and you need to install the new application (purple icon) to continue playing. It is a mandatory update.
Here's what to do if you don't see the update:
Check that the link/invitation code is complete (copied in full) and that you are logged in with the correct account.
If it still doesn't work, go to Profile → Report a problem and send the contest code (or a screenshot of the link) for us to check.
Make sure you have the latest update. If this continues, uninstall and then reinstall Scorecast. If not, contact or support.