Error when configuring the mysql database

I downloaded image version 2.6.7
When I run the container, wallabag does not start up and the following error is in the log file:

`Starting wallabag ...
Waiting for database ...
Configuring the MySQL database ...
ERROR 1064 (42000) at line 1: You have an error in your SQL syntax; check the manual that corresponds to your MariaDB server version for the right syntax to use near 'CHARACTER SET utf8mb4 COLLATE utf8mb4_unicode_ci' at line 1`

I'm using MariaDB 11.2.2 as the database

My wallabag.env:

`SYMFONY__ENV__DATABASE_DRIVER=pdo_mysql`
`SYMFONY__ENV__DATABASE_HOST=mariadb`
`SYMFONY__ENV__DATABASE_PORT=3306`
`SYMFONY__ENV__DATABASE_USER=***`
`SYMFONY__ENV__DATABASE_PASSWORD=***`
`SYMFONY__ENV__DATABASE_CHARSET=utf8mb4`
`SYMFONY__ENV__DOMAIN_NAME=***`
`SYMFONY__ENV__MAILER_HOST=***`
`SYMFONY__ENV__MAILER_USER=***`
`SYMFONY__ENV__MAILER_PASSWORD=***`
`SYMFONY__ENV__FROM_EMAIL=***`