Everything seems fine now.
I’m using the DIY v1.42u (Arduino based) OpenSprinkler. It is running firmware version 1.8.3.
I’m also using port 8101 instead of the default port (80).
I am also using version hosted on Rayshhobby.net server.
I suspected that the problem had something to do with my browser (Safari). Itried to connect using Chrome and the app worked fine. So I deleted the cashed data in Safari (cookies, …) and tried to run your app again and this time it worked.
I don’t know what happened the very first time I ran it which seems to have caused the problem, but clearing the data has fixed it.
It is a nice app! Thanks for sharing it !!!