There are multiple reasons as to why your account synchronization status would be DISABLED:

1) ClickGUARD is not able to manage your AdWords account

In case manager access was revoked ClickGUARD can no longer synchronize information from your account and the DISABLED status is set.

If you revoked manager access by mistake please contact support via in-app chat to re-initiate the process and restore synchronization capabilities to your account.

2) Your AdWords account is "empty"

ClickGUARD cannot work with "empty" accounts. In this case synchronization is automatically disabled.

If you accidentally linked an "empty" account please contact support via in-app chat to remove the account and/or replace it with a non-empty one.