For permission issues, it is always good to check if you changed the default permissions when connecting to Facebook. STAGE TEN needs all of the permissions it requested to properly manage live streaming to Facebook.
Check your permissions for STAGE TEN in Facebook:
Go to Facebook -> Settings
2. Select "Business Integrations" on the left, and then click "View and edit" for STAGE TEN
3. Check that all settings are the same as shown in the two screenshots below. Please pay particular attention to the "business features" section.