我的解决方案是运行

mysql_upgrade -u root

场景:我使用自制升级"更新了Mac上的MySQL版本.此后，一些东西起作用了，但是其他命令引发了问题中描述的错误.

Scenario: I updated the MySQL version on my Mac with 'homebrew upgrade'. Afterwards, some stuff worked, but other commands raised the error described in the question.