Hello,

unfortunately, or fortunately, it is not caused by SetupBuilder at all. And nothing changed in the web module for years. It's definitely a problem on your end, I am sorry :-( Web Update and Web Install work absolutely rock solid. It powers tens of thousands web updates and web installs without any problem.

I am sorry you have to give up on web install. I am sure it's just a configuration problem on your server. "Source file not found" means the file was not available when the web update clients requested it. Perhaps you can see in your server logs what caused this.

BTW, our own web install for SetupBuilder (it's the same module you are using) handled quite a few thousands web installs during the last 48 hours.

Friedrich