warning: process /usr/lib/postfix/sbin/qmgr pid 206673 exit status 1

I set up postfix as per https://www.digitalocean.com/community/tutorials/how-to-install-and-configure-postfix-as-a-send-only-smtp-server-on-ubuntu-20-04

I tried sending a test email. I did not get an error message, but email was never delivered. Looked at log. Got this output:

Apr 27 22:33:02 postfix/master[204809]: warning: process /usr/lib/postfix/sbin/qmgr pid 206673 exit status 1

Apr 27 22:33:02 postfix/master[204809]: warning: /usr/lib/postfix/sbin/qmgr: bad command startup – throttling

Apr 27 22:33:02 postfix/master[204809]: warning: process /usr/lib/postfix/sbin/pickup pid 206672 exit status 1

Apr 27 22:33:02 postfix/master[204809]: warning: /usr/lib/postfix/sbin/pickup: bad command startup – throttling

Apr 27 22:34:02 postfix/pickup[206796]: fatal: open dictionary: expecting “type:name” form instead of “site:”

Apr 27 22:34:02 postfix/qmgr[206795]: fatal: open dictionary: expecting “type:name” form instead of “site:”

Apr 27 22:34:03 postfix/master[204809]: warning: process /usr/lib/postfix/sbin/qmgr pid 206795 exit status 1

Apr 27 22:34:03 postfix/master[204809]: warning: /usr/lib/postfix/sbin/qmgr: bad command startup – throttling

Apr 27 22:34:03 postfix/master[204809]: warning: process /usr/lib/postfix/sbin/pickup pid 206796 exit status 1

Apr 27 22:34:03 postfix/master[204809]: warning: /usr/lib/postfix/sbin/pickup: bad command startup – throttling

Anything here sticks out to anyone here?