Thank you for contacting us. PlantUML is on a 3rd-party add-on, so it might not be Confluence which is causing this error.
You'll want to check first via Developer Tools in your browser to see what any issues might be. You can verify that your network isn't blocking any of the domains or IP addresses that Atlassian uses.
If you can confirm that is not the case, I would recommend reaching out to the vendor directly. You can find the vendor's contact information by visiting the entry for the add-on which provides this functionality, and click on the Support tab from that page.
It’s very important to have access to the workflow process from anywhere. Especially if you manage the work of others. There is no difference whether you’re out of office, or drive a ca...
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