Chromium and self-signed certificates

I'm trying to get chromium under RasPiOS to open an
https connection to a private webserver that's using
a self-signed certificate. Apache starts up without
reporting any errors, chromium opens the page but
reports only an http connection. All I'm aiming for
at this point is encryption, not authentication.

Looking at the page that opens and examining the
certificate reports only one thing that looks like
it might be an error. Under Certificate Basic Constraints
the field value contains:

Critical
Is a Certification Authority
Maximum number of intermediate CAs: unlimited

Anybody got a link to a good description of how to
troubleshoot this sort of problem? For example, where
does chromium put its error logs?

Thanks for reading, and apologies for the naive question!

bob prohaska