Here is a list of common problems with some proposed solutions.
Client is cycling.
A Citrix XenDesktop connector kiosk argument is wrong, which is an argument before the double dashes (--). See Table 4.1, “Required Kiosk Session Arguments for Citrix XenDesktop Connector” and Table 4.2, “Optional Kiosk Session Arguments for Citrix XenDesktop Connector” for more details.
Client cannot connect to Citrix Web Interface.
SSL is configured on the Citrix Web Interface, but it is not configured on the Citrix XenDesktop connector.
The URL to the Citrix Web Interface or the alternate Citrix Web Interface URL is wrong or not provided in the kiosk arguments.
The automatic client detection is not disabled. See Section 3.1, “Disabling Automatic Client Detection” for more details.
Nothing happens after clicking a virtual machine on the Available Desktops screen.
A Windows connector kiosk argument is wrong, which is an argument after the double dashes (--).
The virtual machine is not registered with the Citrix Farm, but it is assigned to the user. Or, the Citrix XenDesktop Agent is not installed or is pointed at the wrong Farm.
The Desktop Group is not enabled for RDP access. See Section 3.4, “Enabling RDP Access for Desktop Groups” for details.
RDP is not enabled on the virtual machine. See Section 3.2, “Enabling RDP Connections on the Virtual Desktops” for details.