Problem 

In a Test case the Test Details custom fields are not shown and instead it shows the error message below:

Solution 1

1. Go to the Project Settings, Screens and edit the screens
2. Choose the Screen Scheme for the Test issue type
3. Edit the default screen of the scheme and make sure that it has the following configuration:
   
   
   
   
   
   

Solution 2

1. Go to your project -> Project Settings -> Issue types
   
   
   
2. Button Actions -> Edit issue types
   
   
   
   
3. Remove all the Xray Issue Types -> Save
   
   
   
   
4. Go back to your Project -> Project Settings -> Button Actions - Add Xray Issue Types
   
   
   1. If you don't see the option "Add Xray Issue Types", make sure that the user belongs to a group that is allowed to "Add Xray Issue Types". Check this on "Miscellaneous" menu of Xray configuration.
      
      

Solution 3

Go to your project -> Project Settings -> Fields -> Button Actions - Edit fields

• On the Field configuration where the Issue type Test belongs, check if some of these custom fields is hidden
  • Test Type
  • Cucumber Test Type
  • Cucumber Scenario
  • Generic Test Definition
  • Manual Test Steps
• If some of these custom fields is hidden, please click on Show
  • Example for the custom field "Cucumber Test Type"

Solution 4

Go to Jira Administration  -> Issues -> Fields - Custom Fields

For the custom fields described on the Solution 3, check if all of these custom fields are associated with the Issue type Test and applied to a Global Context

Example for the custom field Cucumber Test Type

• Search for the each custom field and click on Configure
• 
• Click on the link - Edit Configuration
• Check if this custom field is associated with the issue type Test and if it's applied in a Global Context
• Example: 

Link for related documentation

Custom Fields and Screen Configuration