Facebook OAuth (cordova) stopped working

On a perfectly working meteor/cordova app, we just discovered that facebook oauth has stopped working with the dreaded “For Your Account Security Logging Into From An Embedded Browser Is Disabled”.

Is anyone else seeing this? The only reference I could find on the Internet was this thread which remains unresolved: For Your Account Security Logging Into From An Embedded Browser Is Disabled - Developer Community Forum - Facebook for Developers

Our app settings all look correct and there are no warnings or actions items in our panel. The OAuth URLs all validate (domain.com/_oauth/facebook)

Were you able to fix this problem?