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/s8PZjD4UZPsT47Ka0j084S2qUs2V0y7wzp_C2XWmh54: Timeout during connect (likely firewall problem)