Cookie and "we care about your privacy" banners are often the cause here, especially if you're in the EU / UK / possibly California[1].
On some websites, those are just modals that obscure the content, something that reader mode can usually deal with just fine, but on others, they're implemented as redirects or rendered server-side.
If reader mode doesn't work, dismiss those first and try again.
On some websites, those are just modals that obscure the content, something that reader mode can usually deal with just fine, but on others, they're implemented as redirects or rendered server-side.
If reader mode doesn't work, dismiss those first and try again.