This is Max from the Shopify Team.
When you posted this message, there was an outage that could have been affecting your access to the Shopify admin.
For more details, or to stay on top of any status updates, please check out this page.
If you are still unable to log in, I would suggest clearing your cache and trying to access the admin from your custom URL. This would look like yourstorename.myshopify.com/admin, Then enter the corresponding email address and password.
Check out these docs for some more details;
If the status of your account has changed, please check for any correspondence from our team regarding this.
If that's still not working, please reach out to support directly! Send an email to email@example.com, or look for some more contact details here.