Could you please describe how your OpenBMC send events to listener (other than the SubmitTestEvent) ?

My listener get every generic event triggered by SubmitTestEvent. However when I generate an error or status change I get nothing.

About your question, you could disable the TLS authentication, like :

curl --user root:0penBmc  -k -X PATCH -H "ContentType:application/json" --data '{"Oem": {"OpenBMC": {"AuthMethods": { "TLS": false} } } }' https://${bmc}/redfish/v1/AccountService