I think your small website has some shortcut configured and that is of an "Http" and it is giving the error in the wysiwyg (preview) mode.
Try to remove any shortcut on the page and then check again.
Indeed that would make sense if you read the errormessage, but sadly we have not configured a shortcut there (or on other pages) and we removed all HTTP links everywhere on the page
I have a two websites setup in my Episerver configuration. One for the main website, one for a smaller website.
On the main-website i have no problems editing a page in wysiwyg (preview) mode or in all-properties mode.
My main website (load-balanced on 2 servers) is like this: https://mywebsite.test.nl
My smaller website is like this: https://anothersite.test.nl
My CMS edit url for both sites is: https://cms.mywebsite.test.nl
Both sites are registered in the same Episerver instance.
However in my smaller site i receive this error when trying to go to wysiwyg mode:
"The system uses HTTPS while this shortcut uses HTTP. The shortcut is, however, visible to website visitors."
The all-properties mode does work however.
Any idea how where the problem lies and might be fixed?
Thanks in advance