Please make sure there isn't any permission problems with accessing your projects by Gantt Cloud Add-on. Be aware that add-on is using it's own user to get access into your JIRA instance so it has to have all permissions set accordingly. It usually works just fine but if you have any custom permission scheme applied it might be a problem.
To read more about the Access Control concept, look here:
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Hi Atlassian Community! My name is Shana, and I’m on the Jira Software team. One of the many reasons this Community exists is to connect you to others on similar product journeys or with comparabl...
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