Description:

Facebook Messenger live chat integration loads indefinitely after enabling it; the '3 dots' loading animation appears in the 'Livechat' panel.

Can't disable or reload_pages, even after a server restart.

Disabling Facebook in Administration's Livechat area results in an 'Enable' button in Livechat and the loading stopping, however clicking 'Enable' does nothing, just like clicking 'Disable' and 'reload_pages' did nothing.

Server Setup Information:

• Version of Rocket.Chat Server: 0.60.0
• Operating System: Ubuntu Core
• Deployment Method(snap/docker/tar/etc): Snap
• Number of Running Instances: 1

Steps to Reproduce:

1. Add API ID and secret for Facebook App, enable Facebook Messenger and save in Administration.
2. Enable Facebook Messenger in Livechat.
3. Look on in horror upon the 3 dots of doom. ):

Expected behavior:

To see the glorious new Facebook Messenger integration shown on #8807.

Actual behavior:

3 loading dots of doom.