I solved the problem.
mstsc login to your VPS or Dedicated
command cmd window.
cd %plesk_bin%
dbclient.exe --direct-sql --sql="select * from cp_access"
dbclient.exe --direct-sql --sql="select * from misc where param='access_policy'";
dbclient.exe --direct-sql --sql="update misc set val='allow' where param='access_policy'";
and fixed the problem.
Sincerely,