If you get this error The server has revoked the sToken from FileWave while syncing, the ABM portal password recently changed. So the server tokens becomes invalid and user has to renew the location tokens (Source).
To renew the token, login into ABM, go to Payments and Billing and download the Content Tokens. In FileWave go to Token configuration, Double Click the current token and import the file. Sync and you are done. Do not try to add a new token, this won´t work.