A test authorization for chambersign.demo.bpm.devcode.se to the Let's Encrypt staging service has revealed issues that may prevent any certificate for this domain being issued.
Fetching http://chambersign.demo.bpm.devcode.se/.well-known/acme-challenge/pOBQmPvGf8tja22R5aoQO8JpwIXvES6CbmWnS8NCArw: Timeout during connect (likely firewall problem)