I have an app that I made years ago (last update was Dec 2019) and all works well. Original file can be passed between android phones and no problems.
I made a new apk from the same project and now everything is going wrong. My latest problem is "Error 1101: Unable to get a response with the specified URL". The URL is unchanged and the older downloads work.
I can only assume a change has happened in the MIT app inventor site, just like the other problems I've adjusted for. Any suggestions?