In case you see the following error while scheduling or going live:
(#200) App needs permission scopes (MANAGE_PAGES, PUBLISH_PAGES) to create live video on behalf of a page user
You need to reconnect the account you want to stream on.
Open stream settings (gear icon in the header) and click on the "+" button to reconnect your social account.
In case it didn't help, you can revoke FB app permissions on the profile page.
If you still experience any issues, feel free to contact our support team.