Hi,
The Meraki Block Page will appear only for "HTTP". Try browsing a HTTP Url.
For more information check this Url
https://documentation.meraki.com/MX/Content_Filtering_and_Threat_Protection/Content_Filtering/Conten...
Excerpt from the above Url.
Why is the Meraki block page not displayed?
If the website you are trying to reach is using HTTPS/SSL (rather than HTTP), the browser will display an error page rather than the Meraki block page. Because HTTPS/SSL traffic is encrypted, the MX cannot decrypt and redirect HTTPS traffic to the block page. Instead, the request will simply time out.
Regards,
Ajit
AjitsNW@gmail.com
www.ajit.network