Hi @I-med ,
One simple workaround is to type thisisunsafe in this page, and you will be redirected to the page you want shortly after that. thisisunsafe is a way to bypass security errors on Microsoft Edge.
UPDATE
Please note that you have the group policy SSLErrorOverrideAllowed disabled. It will stop you from proceeding from the warning page. That's why all these solutions are not working for you. You may need to contact your Administrator to grant you the permission to bypass the warning and modify the policy. After that, you are free to test these solutions again.
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Best Regards,
Shijie Li