Any hints for resolving failing web access to JetBot?

[iescumpu-is]

Wondering if anyone can offer advice on the issue I’m encountering with my Waveshare JetBot, based on the JetsonNano.
I’ve copied the pre-built 4GB JetBot image jetbot-043_nano-4gb-jp45 (based on JetBot ver 4.3) to a 128GB SD card. With this image the Ubuntu Linux boots up. With attached display, keyboard & mouse I can log in using the nvidia login & password and operate the Linux environment. I enabled wifi and connected to the network. I got response from the JetBot after sending ping from my notebook using the respective ip address.
The problem is that accessing the JetBot via the web isn’t working. From the same notebook used to ping the JetBot successfully, I use the Chrome browser entering the URL http://:8888 and after a while receive the following error: This site can’t be reached - refused to connect.
Would appreciate any hints for overcoming this issue.