Asset on QNAP won't open after updating

[kittybag]

I have just updated Asset on my QNAP NAS to the latest version. When I try and open it from the App Center I get the message '192.168.86.29 refused to connect'. I am connected to the NAS. I have tried rebooting the NAS and removing and re-installing Asset but to no avail. Any suggestions (for someone who is gnerally at sea in this area).