My guess is not that page directly, but content from another site referenced by that page is blocked.
I used Chrome developer tools, and this is the domains that are used:
![PhilipDAth_0-1692648088859.png PhilipDAth_0-1692648088859.png](https://community.meraki.com/t5/image/serverpage/image-id/31962iF4FEFD6328D8DCA7/image-size/medium?v=v2&px=400)
Try whitelisting those - or running them through the content filter lookup tool to see which URL is being blocked.
![PhilipDAth_1-1692648142382.png PhilipDAth_1-1692648142382.png](https://community.meraki.com/t5/image/serverpage/image-id/31963iE39EB2D8AAF25BCD/image-size/medium?v=v2&px=400)