Adding a Jira field to Issue screen in GanttTable
If you encounter this error message when working with GanttTable, it is because the issue field type has not been set in your project settings.

Such date fields must be added to the issue screen from your Jira settings. And only the issue type that has the mapped fields can be planned in GanttTable.
Here is how to do it:
In Company-managed projects, you might find yourself unable to access the Issues settings. That is because you have limited permission in the Jira instance.
To solve this, you should contact and ask your Jira admin to add permission.
Adding permission in Company-managed projects
For Jira admins, you can go to the project you want to add permission and choose Project settings.

Next, you can go on to choose the Permission tab on the left column, locate the Action button, and select Edit permissions.

Here, you can add permission to all users in your Jira instance by choosing Any logged in user.
