Suddenly got
SQLSTATE[HY000]: General error: 1835 Malformed communication packet (SQL: select * from tb_users where (username =
tb_users
username
An emergency Release of MariaDB 10.5.8, 10.4.17, 10.3.27, and 10.2.36 is now available that was released to specifically solve this protocol incompatibility in old PHP versions and PDO.