Problem on "Sign-on Policy Denies Access"

Summary:

I'm having trouble logging in. It says "Sign-on Policy Denies Access"

Content (required):

I'm having trouble logging in. It says "Sign-on Policy Denies Access"

After entering the username and password correctly, I expect to see the Cloud homepage

BUT

I can not log in to the OCI

No users including admin users can log in to IDCS.

so I cannot modify the sign-on policies.

And I chat with the live chat agent

they said that they cannot handle it ( need backend )

I hope the cloud support team can help me to fix the error

Please notify me if cloud details are required.