Problem
When viewing the time tracker gadget, the priority icons are not displayed correctly. They appear as a broken image.
Solution
This can happen when the Cloud instance was migrated from DC and previously had external links set on the priority icon.
On Forge, external links do not work.
You will need to edit the priority icons by uploading an image to Jira. For more information, please see: https://support.atlassian.com/jira/kb/how-to-change-the-icon-for-priorities-field/