Running Roundcube 1.3.9, Dovecot 2.3.6 and mySQL 5.7.26

Dovecot log:

Jul 23 23:07:15 imap-login: Info: Login: user=<myuser@bordo.com.au mailto:myuser@bordo.com.au>, method=PLAIN, rip=192.168.1.27, lip=192.168.1.9, mpid=32877, TLS, session=<dJoh34iOicjAqAEb> Jul 23 23:07:15 imap(myuser@bordo.com.au mailto:myuser@bordo.com.au)<32877><dJoh34iOicjAqAEb>: Info: Logged out in=29 out=529 deleted=0 expunged=0 trashed=0 hdr_count=0 hdr_bytes=0 body_count=0 body_bytes=0

But Roundcube web login page says:

Login failed.

Nothing is logged to Roundcube’s logs.

Any suggestions?

Thanks,

James.