When changing the issue type name of Test Execution to Xray Test Execution, and converting a Story into this issue type, the Document Generator throws an error when trying to use it on the issue

When changing the issue type name of Test Execution to Xray Test Execution, and converting a Story into this issue type, the Document Generator throws an error when trying to use it on the issue.

Steps to reproduce:

• Change Test Execution issue type name to Xray Test Execution.
• Create a Story.
• Convert the Story to Xray Test Execution.
• Try to use the Document Generator to export the issue.
• The following error is thrown:
  

Expected Result:

• Document Generator should show the list of templates and work as usual.