ERROR 1449 (HY000): The user specified as a definer ('mysql.infoschema'@'localhost') does not exist

I am trying to list all tables from mysql database on ubuntu os. But I am getting this error all time;

mysql> use mysql;Database changedmysql> show tables;ERROR 1449 (HY000): The user specified as a definer ('mysql.infoschema'@'localhost') does not exist

I have checked my mysql version:

mysql  Ver 8.0.20 for Linux on x86_64 (MySQL Community Server - GPL)

So it seems it is last version of mysql.

How can I fix this error?

Please help