The provider hosted app runs in HTTPS, our SharePoint environment in HTTP.
Example of an error in IE:
SEC7111: HTTPS security is compromised by http://ap/project/blabla/_layouts/15/sp.ui.controls.js
Example of an error in Chrome:
[blocked] The page at 'https://ap:2281/Appname/?SPHostUrl=…' was loaded over HTTPS, but ran insecure content from 'http://ap/project/blabla/_layouts/15/sp.ui.controls.js': this content should also be loaded over HTTPS.
How can we solve this issue without setting our SharePoint environment also to HTTPS?