Unfortunately, Facebook recently shut down some of the APIs that mimoLive is using to fetch the comments for a Facebook live stream. This caused problems when streaming to Facebook regardless of whether you were using the Comments feature or not.
To address these problems, we had to temporarily turn off the Comments feature for Facebook live streams beginning with mimoLive 4.0.3.
Currently, the comments feature only works with YouTube comments. We've changed the way mimoLive accesses the Facebook comments and are currently awaiting review by Facebook. We'll release an update to mimoLive as soon as Facebook approves the changed API use. Thank you for your patience.