Cannot Enable Certificates I've got a Samsung Galaxy J3 Prime running Oreo 8.1 that is getting NET::ERR_CERT_AUTHORITY_INVALID on literally every website, regardless of browser.  When I check the security certificates (Settings -&gt; Security -&gt; Other Security Settings -&gt; View Security Settings) I see that every certificate is disabled and if I try to enable them they seems to disable again immediately.
I've tried multiple networks and applied all the updates I can with no luck.  This is a friend's phone so I don't know if any apps have been installed recently or anything.
Hopefully someone can think of something I have not.
I never did figure out why the certificates were greyed out, but I was able to re-enable them by tapping each one and using the enable button. For some reason the enable slider in the list didn't work, but tapping them and then tapping enable did.