After installing the plugin gives error

I just install the plugin and in the contact from it gives me this error in my exiting from.

Notice:Undefined index: trash in /home/asiatrav/public_html/wp-content/plugins/cf7-grid-layout/assets/cf7-admin-table/admin/cf7-post-admin-table.php on line 339

Notice:Undefined index: trash in /home/asiatrav/public_html/wp-content/plugins/cf7-grid-layout/assets/cf7-admin-table/admin/cf7-post-admin-table.php on line 340

Notice: strpos(): Offset not contained in string in /home/asiatrav/public_html/wp-content/plugins/cf7-grid-layout/assets/cf7-admin-table/admin/cf7-post-admin-table.php on line 340

The Code is:

$idx = strpos($actions['trash'],'_wpnonce=') + 9;
$nonce = substr($actions['trash'], $idx, strpos($actions['trash'],'"', $idx) - $idx);