Hello,
Thank you for using our Microsoft Advertising Community Forum!
I understand from your message that you do manage to log into your Microsoft Advertising Account, but when you login you are unable to see your account/campaign details. There is just a blank page visible to you.
Thank you for the detailed message. From what I can see you have already gone through the basic workarounds that we normally suggest in these scenarios. What is happening might be a temporary glitch. For finding out more I would need to check your account or ask our team of experts to review the account in detail. An Escalation might be required with screenshots or a steps recorder file. I have sent you a private message asking for additional details. You are welcome to respond when you find the time.
Alternatively, our support teams are happy to discuss your account in more detail via phone, chat or email to provide review assistance, please see our support page to reach out!
I hope the information provided here will at least partly answer your question. If you have any additional questions please do not hesitate to reach out to our support.
Kind regards,
Vahid | Microsoft Advertising Support Specialist | 800-518-5689