Web Server Disconnects Prematurely

I have followed the tutorial at Wireless Control of Devices with the MKR1010 - Arduino LiveCast Series S02E04 - YouTube (Wireless Control of Devices with the MKR1010 - Arduino LiveCast Series S02E04) and Hurray! It works! Yahoo! I'm using pretty much unmodified source code that I downloaded to accompany the video tutorial. Of course, I had to change the ssid and my network password!

I can make the LEDs blink and the servo motor turn via the web browser on my phone or my computer.

However, I can only click once and the serial monitor indicates that the client disconnected. Since I've reproduced with with Chrome and Edge on Windows 10, and Chrome on my Samsung/Android phone, I don't think it is a browser issue.

I'm using the latest WifiNina (1.5.0) and latest arduino IDE.

Can anyone guide me? Is this a bug in WifiNina?

Thanks
Siegfried