DB Error: MySQL server has gone away

Stack Trace:

File: /home/anais/public_html/lib/pkp/classes/plugins/PluginSettingsDAO.inc.php line 108
Function: DAO->retrieve("SELECT setting_name, setting_value, setting_type FROM plugin_set...", Array(2))

File: /home/anais/public_html/lib/pkp/classes/plugins/ThemePlugin.inc.php line 414
Function: PluginSettingsDAO->getPluginSettings("2", "bootstrapthreethemeplugin")

File: /home/anais/public_html/plugins/themes/bootstrap3/BootstrapThreeThemePlugin.inc.php line 51
Function: ThemePlugin->getOption("bootstrapTheme")

File: /home/anais/public_html/lib/pkp/classes/plugins/ThemePlugin.inc.php line 113
Function: BootstrapThreeThemePlugin->init()

File: (unknown) line (unknown)
Function: ThemePlugin->themeRegistered("PluginRegistry::categoryLoaded::themes", Array(1))

File: /home/anais/public_html/lib/pkp/classes/plugins/HookRegistry.inc.php line 107
Function: call_user_func(Array(2), "PluginRegistry::categoryLoaded::themes", Array(1))

File: /home/anais/public_html/lib/pkp/classes/plugins/PluginRegistry.inc.php line 150
Function: HookRegistry::call("PluginRegistry::categoryLoaded::themes", Array(1))

File: /home/anais/public_html/lib/pkp/classes/template/PKPTemplateManager.inc.php line 911
Function: PluginRegistry::loadCategory("themes", True)

File: /home/anais/public_html/lib/pkp/classes/plugins/Plugin.inc.php line 347
Function: PKPTemplateManager::getManager()

File: /home/anais/public_html/lib/pkp/classes/plugins/BlockPlugin.inc.php line 39
Function: Plugin->_registerTemplateResource()

File: /home/anais/public_html/lib/pkp/classes/plugins/PluginRegistry.inc.php line 69
Function: BlockPlugin->register("blocks", "plugins/generic/webFeed", Null)

File: /home/anais/public_html/plugins/generic/webFeed/WebFeedPlugin.inc.php line 44
Function: PluginRegistry::register("blocks", Object(WebFeedBlockPlugin), "plugins/generic/webFeed")

File: /home/anais/public_html/lib/pkp/classes/plugins/PluginRegistry.inc.php line 69
Function: WebFeedPlugin->register("generic", "plugins/generic/webFeed", Null)

File: /home/anais/public_html/lib/pkp/classes/plugins/PluginRegistry.inc.php line 140
Function: PluginRegistry::register("generic", Object(WebFeedPlugin), "plugins/generic/webFeed", Null)

File: /home/anais/public_html/lib/pkp/classes/core/Dispatcher.inc.php line 132
Function: PluginRegistry::loadCategory("generic", True)

File: /home/anais/public_html/lib/pkp/classes/core/PKPApplication.inc.php line 247
Function: Dispatcher->dispatch(Object(Request))

File: /home/anais/public_html/index.php line 68
Function: PKPApplication->execute()

DB Error: MySQL server has gone away

Stack Trace:

File: /home/anais/public_html/lib/pkp/classes/session/SessionDAO.inc.php line 111
Function: DAO->update("UPDATE sessions SET user_id = ?, ip_address = ?, ...", Array(9))

File: /home/anais/public_html/lib/pkp/classes/session/SessionManager.inc.php line 185
Function: SessionDAO->updateObject(Object(Session))

File: (unknown) line (unknown)
Function: SessionManager->write("i5r2nuond2p3g14liqr5ppf6n6", "")

File: (unknown) line (unknown)
Function: session_write_close()