Object of class mysqli_result could not be converted to string

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  SQLSTATE[HY000] [1698] Access denied for user 'root'@'localhost' (SQL: select * from information_schema.tables where table_schema = whatsapp and table_name = migrations and table_type = 'BASE TABLE')

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  Job for mysql.service failed because the control process exited with error code. see "systemctl status mysql.service" and "journalctl -xe" for details.

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