Re: Upload Javascript App on PBX
I would check if the URL on the App Object in the PBX points to the App instance.
On the App instance you should have a setting for "Webserver path". This is the part of the URL that be used as URL in the App Object.
https://<hostname>/<webserver_path>/<app-htm-filename-without-extension>
Please check this.
Other possible problem: When the App instance is not running, you could get a 404 error too.