93002: Message annotations, updates, appends, and deletes not enabled

An operation could not be performed because the channel did not have the 'Message annotations, updates, appends, and deletes' rule enabled.

What you should do

Enable the "Message annotations, updates, appends, and deletes" rule for the channel's namespace in your app settings, then retry. This one rule turns on both message annotations and message updates, deletes and appends, one of which the operation depends on.

Why it happens

The operation uses message annotations or updates, deletes and appends, but the channel's namespace did not have the "Message annotations, updates, appends, and deletes" rule turned on.

What you'll see

The error is reported with code 93002 and HTTP status 400. The message is of the form Annotations are only supported on channels with mutable messages enabled in channel namespace settings.