Do you have a required field on your create screen (for the subtask) ?
If yes try this :
- Remove the required field
- Open the issue in JIRA, outside the board view, there you will be able to create a new Subtask.
- Disable the new JIRA issue view.
You will find more info in this link
Hope this helps
Hi Chantelle, that is an odd error. Have you tried other projects? Can you create tasks ok, just not sub-tasks? Do others have this same issue? Depending on these answers I suspect you may need to reach out to Atlassian Support as it may be something weird with your instance.
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