JIRA throws error when trying to create new issues
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Summary
Problem
When trying to create a new issue, JIRA throws the following error
The JIRA server was contacted but has returned an error response. We are unsure of the result of this operation.
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Diagnosis
Might be happening to specific type of projects (eg. Software project, Business project)
Nothing is thrown in the logs
Cause
The affected project doesn't have any Standard Type task

In the example above, all Business type projects are affected (even newly created ones). From the screenshot, we can see that both issue types are sub-tasks
Solution
Resolution
Give the project a standard issue type
Single project
If only a single project is affected, create a new standard issue type and add it to the Issue Type Scheme the affected project is using
Business Projects
Business projects use the Task and Sub-task type by default
The problem arises when Task is modified to be a sub-task
To resolve this, rename/delete the current Task (sub-task) and create a new standard issue type and name is Task
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