Can't access cyrus imapd anymore from imp

[FreeBSD user]

In the recent round of apache updates, I can't get horde to work with my
cyrus-imapd anymore. The system is setup with a self-signed cert
(non-production test system), even though imp is set to NOT use imaps,
just regular imap (143). But when trying to do user auth, I get this in
the logs:

Dec 11 22:49:51 mxsrv imapd[27103]: accepted connection
Dec 11 22:49:51 mxsrv imapd[27103]: TLS engine: cannot load CA data
Dec 11 22:49:51 mxsrv imapd[27103]: TLS engine: No CA file specified.
Client side certs may not work
Dec 11 22:49:51 mxsrv imapd[27103]: starttls: TLSv1 with cipher (NONE)
(0/0 bits) no authentication
Dec 11 22:49:51 mxsrv master[63711]: process 27103 exited, status 0

imapd.conf has:
tls_cert_file: /var/imap/cyrus.pem
tls_key_file: /var/imap/cyrus.pem


horde/imp/config/servers.php has:
$servers['cyrus'] = array(
    'name' => 'XtremeDev Test Mail',
    'server' => 'mxsrv.XtremeDev.com',
    'protocol' => 'imap',
    'port' => 143,
    'namespace' => 'INBOX.',
    'maildomain' => 'XtremeDev.com',
    'smtphost' => 'mxsrv.example.com',
    'realm' => 'XtremeDev.com',
    'preferred' => ''
);


Any hints please? Thanks.