GallyException

SQLSTATE[HY000]: General error: 2006 MySQL server has gone away

Array
(
    [0] => SELECT * FROM content2 WHERE (`content_menu_id` = :content_menu_id) ORDER BY `content_id` DESC LIMIT 1
    [1] => Array
        (
            [:content_menu_id] => 198
        )

)

File: .../swisscleanroomconcept.ch/httpdocs/tools/gallyapi/src/Database/PDOModel.php

Line: 890

Gally\Homepage\Entities\Content2 Object
(
    [table:protected] => content2
    [prefix:protected] => 
    [defaultOrderBy:protected] => content_id DESC
    [rowIdentifier:protected] => id
    [timestamps:protected] => 
    [timestampCreatedAt:protected] => created
    [timestampUpdatedAt:protected] => updated
    [manualSort:protected] => 
    [dateFormat:protected] => d.m.Y
    [dateTimeFormat:protected] => d.m.Y - H:i
    [timeFormat:protected] => H:i
    [emptyColumnPlaceholder:protected] => -
    [db:protected] => PDO Object
        (
        )

    [idData] => Array
        (
            [0] => Array
                (
                    [content_id] => 8990
                    [content] => 
                    [title] => Reinraum Portal - Swiss Cleanroom Concept - Reinraum Seminare Inhouse E-Learning Schweiz
                    [description] => Das schweizer Reinraumportal. Seminare, Inhouse Seminare, E-Learning und Onlineshop zum Thema Reinraum.
                    [keywords] => Reinraum Seminare
                    [page_topic] => Reinraum Schweiz Deutschland 
                    [publishing_date] => 2018-03-29 10:54:00
                    [publishing_check] => 0
                    [creation_date] => 2018-08-20 16:44:28
                    [content_menu_id] => 3
                    [password] => 
                    [password_check] => 0
                    [freefield1] => 
                    [freefield2] => 
                    [freefield3] => 
                    [freefield4] => 
                )

        )

    [id:protected] => 
    [limit:protected] => 1
    [select:protected] => *
    [where:protected] => 
    [wheres:protected] => Array
        (
            [0] => Array
                (
                    [0] => content_menu_id
                    [1] => 198
                )

        )

    [queryString:protected] => 
    [orderBy:protected] => 
    [lastQuery:protected] => Array
        (
            [0] => SELECT * FROM content2 WHERE (`content_menu_id` = :content_menu_id) ORDER BY `content_id` DESC LIMIT 1
            [1] => Array
                (
                    [:content_menu_id] => 198
                )

        )

    [result:Gally\Database\PDOModel:private] => PDOStatement Object
        (
            [queryString] => SELECT * FROM content2 WHERE (`content_menu_id` = :content_menu_id) ORDER BY `content_id` DESC LIMIT 1
        )

    [utf8decode:Gally\Database\PDOModel:private] => 1
    [parameters:protected] => Array
        (
            [:content_menu_id] => 198
        )

    [otherTables:Gally\Database\PDOModel:private] => 
)

Gally\Exceptions\GallyException