From June 6th, 2018 Yelp will be deprecating their review monitoring API for third-party platforms like Sendible who use their API to integrate with their site.
This will affect users who have added the Review Monitoring Service to their account. While we look into resolving this issue, please can you check Yelp directly.
We are sorry for this inconvenience and we will keep you updated. As always, please don't hesitate to contact us if you have any questions.