Internal server error on delete

[aswathy]

I created a backend custom module . The listing of records is looking fine.But When I was trying to delete or copy it returns internal server error.Why?

screenshot-192.168.1.42-14005-2017-09-21-16-16-14-549.png

screenshot-192.168.1.42-14005-2017-09-21-16-15-46-959.png

// List
	'list' => array
	(
		'sorting' => array
		(
			'mode'                    => 1,
			'fields'                  => array('title'),
			'flag'                    => 1,
			'panelLayout'             => 'filter;search,limit'
		),
		'label' => array
		(
			'fields'                  => array('title', 'teaser'),
			'format'                  => '%s <span style="color:#b3b3b3;padding-left:3px;">[%s]</span>'
		),
		'global_operations' => array
		(
			'all' => array
			(
				'label'               => &$GLOBALS['TL_LANG']['MSC']['all'],
				'href'                => 'act=select',
				'class'               => 'header_edit_all',
				'attributes'          => 'onclick="Backend.getScrollOffset()" accesskey="e"'
			)
		),
		'operations' => array
		(
			
			'editheader' => array
			(
				'label'               => &$GLOBALS['TL_LANG']['tl_solutions']['editheader'],
				'href'                => 'act=edit',
				'icon'                => 'edit.gif'
			),
			'copy' => array
			(
				'label'               => &$GLOBALS['TL_LANG']['tl_solutions']['copy'],
				'href'                => 'act=copy',
				'icon'                => 'copy.gif'
			),
			'delete' => array
			(
				'label'               => &$GLOBALS['TL_LANG']['tl_solutions']['delete'],
				'href'                => 'act=delete',
				'icon'                => 'delete.gif',
				'attributes'          => 'onclick="if(!confirm(\'' . $GLOBALS['TL_LANG']['MSC']['deleteConfirm'] . '\'))return false;Backend.getScrollOffset()"'
			),
			'show' => array
			(
				'label'               => &$GLOBALS['TL_LANG']['tl_solutions']['show'],
				'href'                => 'act=show',
				'icon'                => 'show.gif'
			)
		)
	),

[Spooky]

Use the example.org/app_dev.php entry point for a more detailed stack trace. May be create the file app/config/config_dev.yml with the following content:

framework:
    profiler: false

contao:
    image:
        bypass_cache: false

for better performance in the dev environment. Don't forget to clear the dev cache after creating this file.