Same for my case. Strangely “http://” API URLs worked on the mobile just as expected. The problem I have is that I am using Thunkable to build a responsive web-app which is to be used with user’s browser. All the http:// requests was converted to https:// requests.
I have been trying to serve https:// on my server end (a simple apache-flask API) for the past week, but it is more complicated than I thought with all the SSL certificates, domain names stuff etc… haven’t managed to get it to work.
It is frustrating because I used thunkable for the ease of building webapps. Now I may have to learn another platform to build webapps since the APIs I used is the main feature nd works only with http://
Hope the thunkable team is looking into this or to recommend a work around. Thunkable have been a great platform for mobiles app though.