@Namik I have been begging Meraki to allow us to use a blacklist policy to kill the process, but it has not been implemented. I invite you to "submit a wish".
Are you user's admins? If not, you could use OSX server and create a "folder restriction" with the path to pages. I have went ahead and created the payload for it and here is a Google Drive share link. It works fine on my MacBook Pro - pages won't open with the error:
Only admins can get around it.
Drive link:
https://drive.google.com/file/d/1txtoOPsxWrM21xX5dutV_Z7otsHfe69D/view?usp=sharing
Hope this helps,
Jared
Find this helpful? Click the kudos button. Thanks!