How to Fix "customfield cannot be set" Issue in Mend Jira Cloud Plugin

Overview

This guide will help you fix the 'customfield_xxxxx' cannot be set issue in Jira Cloud Plugin, which prevents Jira issue creation:
Field 'customfield_xxxxx' cannot be set. It is not on the appropriate screen, or unknown.

This error message might pop up for new projects created after a new Jira integration is established.

Getting it done

1. Determine the name of the customfield by navigating to https://<jira-url>/secure/admin/EditCustomField!default.jspa?id=xxxxx
   This will take you to the Custom Field screen, where its name is specified:

   

   At this stage, it is recommended to copy the Field Name to your clipboard.

2. Navigate to https://<jira-url>/secure/admin/ViewIssueFields.jspa

3. Search for the (missing) Custom Field from step 1 and verify that Default Screen is listed in the screens column:

   

   If it isn’t, click the Screens button under the Actions column to add it.

   

4. Navigate to https://<jira-url>/secure/admin/ViewCustomFields.jspa

5. Search for the missing field and verify that it has both a screen and a context listed under the Screens and contexts column:

   

   Note: It’s important to verify that the relevant Issue type is configured in the context.
   If it isn’t, click on Create, edit or delete contexts → Edit Context.
   Then, under Choose applicable issue types, select relevant issue types and apply the change.