Open WebUI not opening in the web browser

I am new to DGX Spark.
I was following the steps outlined for

Open WebUI with Ollama.
When I click on Open WebUI, the browser is erroring out with the message:

Hmmm… can’t reach this page

The connection was reset.

any help will be appreciated

Is the container running?

run docker ps on command line

Check if you’re not having the same issue as Bug in Installiing open WebUI