When migrating an inactive User, it will not be possible to create Test Executions from Test that have it as Reporter

Description
If you migrate an inactive User, and that User is the Reporter from some Tests and those Tests belong to a Test Plan, when trying to create a Test Execution from those Tests, it will not allow to create it and it will show a spinning wheel indefinitely.

Pre-conditions
Have run a migration with an inactive User as the Reporter of some Tests

How to reproduce

1. Go to a Jira DC instance, create a Test Plan with some Tests and execute it, and select a specific User for it.
2. Go to User management and mark that User as inactive
3. Run a migration to another DC instance with an inactive User
4. On the new instance, go to the migrated Test Plan and try to Create a New Test Execution

Actual result/Attachments
It will show a spinning wheel indefinitely. From the HAR file we can see the following error from Jira API:

Expected result
As the error is from Jira API it´s not on Xray's side to solve this. Still, we should treat this differently instead of just having a spinning wheel indefinitely and present an warning informing that the User is inactive/doesn´t exist.

Solution
To solve this situation, it´s only necessary to select an active User as the Reporter of the Tests