I installed Chargeback Manager 2.6 recently. Everything is working fine. I added an ssl certificate for chargeback using the fqdn of the server. That works find also. I went to add chargeback to vspwhere and it complained about the ssl. After further investigation I've found that the url that chargeback is expecting is http://IP address/cbmui. So if you go into chargeback manager and go to settings > general and look at Chargeback Servers it lists the url http://IP address/cbmui. Is there anyway of changing the url to use https://fqdn/mui?
Tried installing the CBM with the fqdn and added the same CBM setup to Vsphere and accessed via a plugin. It worked fine. Can you please update CB_SERVER table with the fqdn URL.