Hello, we have rocketchat livechat installed in our website stage-web.vaar.law It works find but we have an error in console 
In Livechat allowed domains we have ‘vaar.law,stage-web.vaar.law,https:// stage-web.vaar.law,http:// stage-web.vaar.law,prod-web.vaar.law’, I tried to change it only to https:// stage-web.vaar.law but still same error. Do you have any advice to this?
I have the same problem, managed to solve?
The ALLOW-FROM option is only likely to work in legacy browsers like IE8 and Firefox for Android. See:
In my case the solution was: https://github.com/RocketChat/Rocket.Chat/issues/17786