Has your Facebook access token expired? This can happen if you change your Facebook password - when Facebook will automatically revoke access to all connected applications.
If you have active rules and your access token expires, it's crucial that you re-connect as soon as possible. Without access, rules cannot run on your connected ad accounts.
Here's how to grant access again:
This is the account linked to your ad accounts that you signed up to TrustAds with.
Don't try to log in with the 'Login with Facebook' button.
Click the Re-connect account button below your Facebook profile to reauthorise access.
You'll now be re-connected and your rules will resume running.