### Steps to reproduce

1. Begin of the insertionHave an accountEnd of the insertion Begin of the deletion Login as a user with permissions to manage membersEnd of the deletion in Begin of the insertionOpenProject with login or email downcased.End of the insertion Begin of the deletion project AEnd of the deletion

2. Begin of the insertionCreate an account withEnd of the insertion Begin of the deletion Go toEnd of the deletion the Begin of the insertionsame login or email in Jira but upcased.End of the insertion Begin of the deletion members pageEnd of the deletion

3. Begin of the insertionTry to migrate the project with this account involved.End of the insertion Begin of the deletion Click on "Add new member"End of the deletion

4. Begin of the insertionSee thatEnd of the insertion Begin of the deletion TypeEnd of the deletion the Begin of the insertionimport breaks.End of the insertion Begin of the deletion following string: "foo@example.org"End of the deletion


### What is the buggy behavior?

* Begin of the insertion<br>End of the insertion Begin of the deletion The button to invite a member did not work

* There was an error notification shown with the message &quot;XYZ&quot;End of the deletion


### What is the expected behavior?

1. Begin of the insertionExisting OpenProject accounts must be found case insensitively during Jira Import.End of the insertion Begin of the deletion The application should invite the new user with the selected role

2. An email should have been sent to that userEnd of the deletion