Err_cert_authority_invalid error only on mobile devices

I successfully generated cert and apply via hosting panel to my domain: It worked great at the beginning, but for last few days I found error:


which shows only on mobile devices (tested on few devices and few browsers).
How can I resolve it?

Hello @majkelo,

The problem is that your web server is not serving the intermediate certificate. You should upload the cert.pem as you already did and also the chain.pem, in case your hosting panel doesn’t allow the use of chain.pem, use fullchain.pem instead of cert.pem (fullchain.pem contains cert.pem that is your certificate and chain.pem which is the intermediate certificate).


1 Like

This topic was automatically closed 30 days after the last reply. New replies are no longer allowed.