Hello,
According to our search and research, some users have encountered similar problems. One of the users reported that the problem was solved by updating Internet Explorer to the latest version. It is recommended that you also try to update your Internet Explorer to the latest version to see if it helps solve the problem you are experiencing.
Here is the link: https://answers.microsoft.com/en-us/msoffice/forum/all/trying-to-login-to-office-365-i-get-a-blank-screen/2954fdd6-80df-4a36-9096-a8ded1e3e6f0?page=2
Best Regards,
Yanhong Liu
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