Error on rebuild schema

[dabasystem]

Hello,
I have EspoCrm connected to a database in AWS on an RDS machine. I have never had problems, when upgrading to version 7.x it can not perform the rebuild correctly.

The LOG shows this:

[2022-05-01 19:50:14] NOTICE: (404) GET /; line: 110, file: /var/app/current/htdocs/application/Espo/EntryPoints/Image.php [] []
[2022-05-01 19:50:14] NOTICE: (404) GET /; line: 110, file: /var/app/current/htdocs/application/Espo/EntryPoints/Image.php [] []
[2022-05-01 19:50:18] ERROR: Failed to rebuild database schema. Details: Class 'Espo\Core\Utils\Database\DBAL\Platforms\MySQLPlat form' not found at /var/app/current/htdocs/application/Espo/Core/Utils/Database/DBAL/Platforms/MariaDb1027Platform.php:37 [] []
[2022-05-01 19:50:18] DEBUG: API (500) Error while rebuilding database. See log file for details.; POST /Admin/rebuild; Route pattern: /Admin/rebuild; Route params: Array ( [controller] => Admin [action] => rebuild ) [] []
[2022-05-01 19:50:18] ERROR: (500) Error while rebuilding database. See log file for details.; POST /Admin/rebuild; line: 158, file: /var/app/current/htdocs/application/Espo/Core/DataManager.php [] []

Do I need to modify any settings?

Thank you very much,
Greetings

[dabasystem]

Hello,
I have tried a fresh install and have the same problem. When connecting to the external DB in AWS RDS throws the error.

What I can do?