Hi Butdeso,
We appreciate you reaching out to us.
We’d like to gather additional details that may help us be in a better position to assist you.
Is the issue isolated to accessing your account on iCloud.com?
If yes, please check if there is a system outage while you are experiencing the issue.
Apple - Support - System Status
If there is no system outage and you continue to experience the issue, please login to our Apple ID page and check if your account details are up to date.
Manage your Apple ID
Also, check if you will experience the same issue on a different browser.
If you continue to experience the issue, please reach out to us here so we can take a closer look into the issue: Get Support
Take care!