There is an issue with the patch #3246887,
When you click on the "Create user" button. the form doesn't react.
This is because the form has a random ID and so the line :
"var $form = $(this).find("#addUsersForm");" l177 from server_privileges.js doesn't work
When I remove the modified lines from the patch, the bug #3188444 is not present
So I think it would be better to remove the patch.