Hello @Behnam Ashouri ,
Welcome to Microsoft Q&A forum.
This error may be caused by your account or the web browser(cache…).
For the account, please check if your account was tied with other things or be blocked/locked by them. If possible, try to use another account(maybe a new account) to sign in website and download VS.
For the web browser, please try to clean browser cache, restart web browser or use other web browsers to sign in again.
BTW, I have checked and the link that you are using is correct, and VS 2013 isolated shell can be downloaded successfully.
Best Regards,
Tianyu
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