@freehold2018, @omar.benammar, @dee, @chris.williamson1996, @ed727, @rrgustav
I’ve solved this for my instance of the problem.
Uninstalling the 'Simple Chart’ plugin, removes the problem.
I copied my app including the database, then removed plugins one by one until I found the error went away when Simple Charts was uninstalled. Repeated verifying this by creating 4 new copies of the app, and just uninstalling Simple Charts.
Your cloudfront problems may have different root causes, this is mine.
Regards
A