Jira and Code Collaborator integration issue

Hello Team,

We recently integrated Jira with code collaborator.

In code collaborator the server URI we use to integrate to Jira is with URL https://........

However, we should be able to use HTTPS instead of HTTP. But using HTTPS gives a connection error, when collaborator tries to connect to Jira.

The possible way to fix this issue would be to use HTTPS instead of HTTP in collaborator. But if we do that, we get the following error:

sun.security.validator.ValidatorException: PKIX path building failed: sun.security.provider.certpath.SunCertPathBuilderException: unable to find valid certification path to requested target

Please let me know how to fix this issue?

Thanks!