Hello @t3kg33k
To disable certificate validation on Document Server’s side you have to set this parameter "rejectUnauthorized" to false in next config /etc/onlyoffice/documentserver/default.json
The issue with Test Example appeared after applying template of ds.conf config. To fix this you have to run next command bash documentserver-update-securelink.sh
If you face any other issues please provide all log files of Document Server.