Symfony 4 - Charset issue

Hello, I've tried to run symfony application on cpanel shared webhosting, but everything which is displayed from the database is in question marks. (??) MySQL version: 5.5,PHP 7.3,Symfony 4.3.5 The content is in Bulgarian language, table collations are utf8mb4_unicode_ci. I tried to configure doctrine.yaml to utf8_general_ci, converted the table, inputing all data again, but without any success. How can I fix this?