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The error page in the screenshot shows ERROR_VUE_WIDE_BLOCK. According to the documented behavior, this error typically means the Pearson VUE account is blocked, usually because of multiple failed payment attempts when scheduling an exam.
To fix it, the block must be removed by Pearson VUE support. Use the Pearson VUE contact link provided on the Microsoft Certification support page and work with them to unblock the account; after that, retry the operation (such as scheduling the exam) in Microsoft Edge on Windows 11.
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