Hi Arthur, Are you using Jira Server? If so, make sure that its Base URL is accessible from outside of your corporate network. Looks like the integration is trying to reach your server to get the list of projects, but gets blocked by firewall. You can find more info in this help article . Hayk Falakyan Workfront
I believe this is more of a CorpIT question, Arthur. In short, your organization needs to make sure that inbound calls to your network can reach your Jira server. Quoting from the help article:
You must ensure that the jira.workfront.com domain is accessible from your corporate servers. It serves as a middleware environment between Workfront and Jira and is required for the add-on to operate.
You must also whitelist its static IP address of 220.127.116.11 on your firewall for outbound and inbound connections.
Hope this helps. Hayk Falakyan Workfront