Warning: mysqli::__construct(): Error while reading greeting packet. PID=2729 in /volume1/docker/codeserver/workspace/ebook_manager/config.php on line 8

Fatal error: Uncaught mysqli_sql_exception: MySQL server has gone away in /volume1/docker/codeserver/workspace/ebook_manager/config.php:8
Stack trace:
#0 /volume1/docker/codeserver/workspace/ebook_manager/config.php(8): mysqli->__construct('localhost', 'root', Object(SensitiveParameterValue), 'ebook_manager')
#1 /volume1/docker/codeserver/workspace/ebook_manager/index.php(2): require('/volume1/docker...')
#2 {main}
  thrown in /volume1/docker/codeserver/workspace/ebook_manager/config.php on line 8