Hello Chun !
Thank you for posting on Microsoft Learn Q&A.
SSMS tried to reuse a cached token, but your tenant/CA policy now requires an interactive MFA sign in so token retrieval fails.
In SSMS, go to file then account Settings then sign out (or in object explorer, disconnect).
Reconnect and in the connect to server window set authentication = Azure Active Directory – Universal with MFA and complete the MFA prompt.
If the WAM prompt never shows or still fails, switch off WAM in SSMS