[ERROR] No matching routes for OPTIONS /

Happy Vaultwarden user. However when checking my Vaultwarden logs on my Synology the error above shows up every second in the Synology log

Vaultwarden itselfs seems to be running fine and without any issues but would like to get rid or correct the error on my setup.

Vaultwarden 1.27 on Synology Docker with Pfsense/Haproxy in front with a Let’s Encrypt cert

Synology docker settings are out of the box, but added the domain parameter.