In those cases, you really need to retry. It means, that you had the page to choose your username open for too long. By the way, the username shall not contain special characters. If you click on login again, the page and session should be refreshed, and it should work.
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In those cases, you really need to retry. It means, that you had the page to choose your username open for too long. By the way, the username shall not contain special characters. If you click on login again, the page and session should be refreshed, and it should work.