Thanks. I got mine working, yay! After a bunch of trial and error I learned I needed to customize the file /etc/loolwsd/loolwsd.xml directly, following Unauthorized WOPI Host with Nextcloud 16 on custom port . Iām running Nextcloud from the official Docker image behind a Traefik reverse proxy.
This is the error I was seeing:
wsd-00007-00042 2020-08-11 18:28:49.866509 [ docbroker_001 ] ERR No acceptable WOPI hosts found matching the target host [cloud.example.com] in config.| wsd/Storage.cpp:282