В файле /etc/mysql/my.cnf
После [mysqld]
добавить: default-authentication-plugin = mysql_native_password
Пример моего /etc/mysql/my.cnf
[mysqld]
user = mysql
pid-file = /var/run/mysqld/mysqld.pid
socket = /var/run/mysqld/mysqld.sock
port = 3306
basedir = /usr
datadir = /var/lib/mysql
tmpdir = /tmp
lc-messages-dir = /usr/share/mysql
log-error = /var/log/mysql/error.log
explicit_defaults_for_timestamp
bind-address = 0.0.0.0
# PHP 7.4 Fix
default-authentication-plugin = mysql_native_password
# Recommended in standard MySQL setup
sql_mode = "STRICT_TRANS_TABLES,NO_ZERO_IN_DATE,NO_ZERO_DATE,ERROR_FOR_DIVISION_BY_ZERO,NO_ENGINE_SUBSTITUTION"
# Disabling symbolic-links is recommended to prevent assorted security risks
symbolic-links=0
И помните, что mysql_native_password не годитсяиз-за безопасности.