I run Zeppelin 0.8.2 but the hostpage is blanc

I am using the spark 3.0.1 full package

Java LibericaJDK/8

Zeppelin 0.8.2

spark is completely functional by shell

Zeppelin was dowloaded and I followed this tutorial step by stephttps://gist.github.com/codspire/7b0955b9e67fe73f6118dad9539cbaa2

The shell of zeppelin says connection started but I have the localhost/8080 blanc.

Can you please advice on the matter?

Many thanks,

Andy