Hi I setup GrayLog 3.2 on Ubuntu 18.4 in my vmware virtual machine to test. I think manage to configure all well. I also implement ctr and key files that my company provides. But I wanted to send notification to Rocketchat. I see the way to achive this with creating new notification with HTTP Notification. I also configure Rocketchat side there was no problem. When I try to Excecute Test Notifications an error pops up and it says
**Error:** sun.security.validator.ValidatorException: PKIX path building failed: sun.security.provider.certpath.SunCertPathBuilderException: unable to find valid certification path to requested target.
Can anyone help me abouth this issue. I check the other topics but the result was the same.