Validation failed while creating Jira Data Source

MFC Core did not had Jira connector. So, I dumped Jira connector in ...\Micro Focus\Connect\AppData\connectors\mfcConnectorJira folder. The folder contains following files. 

Now, In MFC, I can see Jira option to create one of the data source. So, I'm in 1st option of 4 steps to set up a data source.

  

In 1st step it is asking to enter Jira url: company.atlassian.net, username:its.me@domain.com& password or API access token: *********.

now when I click on Next button, I get below error. I tried with API access token and my Jira password. and both resulted me in same error.

Note: In my enterprise, if Im launching my Jira url in a fresh (or lets say Chrome) browser, 1st I have to enter my SSO ID and its password, and email address (its.me@domain.com) and its password (not necessarily domain password).

I have mfcFullRestClient.jar that was pushed in to C:\Program Files\Micro Focus\Connect\Utilities on March 16, 2021.

Where do I start to resolve this please?

I'm in  MFC Jira Connector 4.4-HF5.819