Download of SSL-VPN (client or config) via User-Portal not working

Hi,

on a fresh configured vXG I'am unable to download the SSL-VPN config or client.

The download page is displayed, but if I'am clicking on one of the four links, nothing happens.
Already regenerated the CA and XGs certificate, rebooted the device, still not working.

 

This is what my chrome console is showing:

Uncaught TypeError: jQuery.handleError is not a function
at HTMLIFrameElement.downloadResponse (common_min.js?version=18.0.0.255:3624)
at HTMLIFrameElement.dispatch (jQueryYUI.js:25)
at HTMLIFrameElement.elemData.handle (jQueryYUI.js:25)