ERROR 1146 (42S02): Table 'mysql.role_edges' doesn't exist

[no name zzzzz]

[root@x ~]# mysql -u root -pxxxxxxxx
mysql: [Warning] Using a password on the command line interface can be insecure.
Welcome to the MySQL monitor. Commands end with ; or \g.
Your MySQL connection id is 745
Server version: 8.0.3-rc-log MySQL Community Server (GPL)

Copyright (c) 2000, 2017, Oracle and/or its affiliates. All rights reserved.

Oracle is a registered trademark of Oracle Corporation and/or its
affiliates. Other names may be trademarks of their respective
owners.

Type 'help;' or '\h' for help. Type '\c' to clear the current input statement.

mysql> grant all privileges on information_schema.* to 'root'@'localhost';
ERROR 1044 (42000): Access denied for user 'root'@'localhost' to database 'information_schema'
mysql> CREATE USER 'dbuser'@'localhost' IDENTIFIED BY 'DBpass#1';
ERROR 1146 (42S02): Table 'mysql.role_edges' doesn't exist
mysql> quit
Bye



what should we do ???