The IDE seems to block specifying a URL in the src property of the BS4 image control. It can be set at run time to URLs. Is there some special way to specify a URL at design time?
It appears to work OK for me. Can you be more specific about what you are doing and what happens?
Look at the sample I uploaded in post https://discuss.appstudio.dev/t/picture-box-sample-projects-wont-scroll-or-zoom/2327/6. If, in Windows, you go to Image1’s property for src and type in https://mydomain.com/picture.jpeg, you get an error box stating the file doesn’t exist.
Now I see what you mean. If you paste https://mydomain.com/picture.jpeg into that field, it changes to https:/mydomain.com/picture.jpeg. I have no idea why at this point.
Best bet is to set it at runtime instead.