Hi @Yevhen Chubarov & AQL,
Welcome to Microsoft Q&A!
The Subscription page may have had an outage. I can open it normally now. Can you try again and confirm if it works or not?
Meanwhile, please check if you have any anti-virus software or group policy setting that is blocking it.
If you have any updates, please feel free to let us know.
Sincerely,
Anna
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