Connection error

PDOException Object
(
    [message:protected] => SQLSTATE[HY000] [2006] MySQL server has gone away
    [string:Exception:private] => 
    [code:protected] => 2006
    [file:protected] => /base/data/home/apps/s~kiedymsza/20220225t174618.441794080987883719/rest/library/backend/classes/Bootstrapbase.php
    [line:protected] => 105
    [trace:Exception:private] => Array
        (
            [0] => Array
                (
                    [file] => /base/data/home/apps/s~kiedymsza/20220225t174618.441794080987883719/rest/library/backend/classes/Bootstrapbase.php
                    [line] => 105
                    [function] => __construct
                    [class] => PDO
                    [type] => ->
                    [args] => Array
                        (
                            [0] => mysql:unix_socket=/cloudsql/jemyrazem:mysql56;charset=utf8;dbname=podstawski
                            [1] => kiedymsza
                            [2] => crucemtuam
                        )

                )

            [1] => Array
                (
                    [file] => /base/data/home/apps/s~kiedymsza/20220225t174618.441794080987883719/rest/library/backend/classes/Model.php
                    [line] => 10
                    [function] => getConn
                    [class] => Bootstrapbase
                    [type] => ->
                    [args] => Array
                        (
                        )

                )

            [2] => Array
                (
                    [file] => /base/data/home/apps/s~kiedymsza/20220225t174618.441794080987883719/rest/library/backend/classes/Model.php
                    [line] => 72
                    [function] => getConn
                    [class] => Conn
                    [type] => ->
                    [args] => Array
                        (
                        )

                )

            [3] => Array
                (
                    [file] => /base/data/home/apps/s~kiedymsza/20220225t174618.441794080987883719/rest/library/backend/classes/Model.php
                    [line] => 49
                    [function] => execute
                    [class] => Conn
                    [type] => ->
                    [args] => Array
                        (
                            [0] => SELECT column_name,data_type FROM information_schema.columns WHERE table_schema='podstawski' AND table_name='churches'
                            [1] => 
                            [2] => 1
                        )

                )

            [4] => Array
                (
                    [file] => /base/data/home/apps/s~kiedymsza/20220225t174618.441794080987883719/rest/library/backend/classes/Model.php
                    [line] => 124
                    [function] => fetchAll
                    [class] => Conn
                    [type] => ->
                    [args] => Array
                        (
                            [0] => SELECT column_name,data_type FROM information_schema.columns WHERE table_schema='podstawski' AND table_name='churches'
                        )

                )

            [5] => Array
                (
                    [file] => /base/data/home/apps/s~kiedymsza/20220225t174618.441794080987883719/kosciol/index.php
                    [line] => 21
                    [function] => __construct
                    [class] => Model
                    [type] => ->
                    [args] => Array
                        (
                            [0] => 40005
                        )

                )

        )

    [previous:Exception:private] => 
    [errorInfo] => 
)