Site health report not showing up

Hello guys!

Basically, whenever I click on tools -> site health, I can see something written for a fraction of a second but then everything dissapears.

To fix this, I tried to :

Clear cache (did not work)

Switch browser (did not work)

Disable every plugin to check for interference (did not work)

I have only 1 plugin installed : cloudflare

Switch themes (did not work)

What can I do to fix this?