PHP/WP Error: Uncaught TypeError: lloc\Msls\MslsAdminIcon::set_href():

Hi,
we were running into a problem in our backend:

PHP/WP Error: Uncaught TypeError: lloc\Msls\MslsAdminIcon::set_href():
Argument #1 ($id) must be of type int, string given, 
called in ***/wp-content/plugins/multisite-language-switcher/includes/MslsMetaBox.php on line 189 and 
defined in ***/wp-content/plugins/multisite-language-switcher/includes/MslsAdminIcon.php:160

Stack trace:
#0 ***/wp-content/plugins/multisite-language-switcher/includes/MslsMetaBox.php(189): lloc\Msls\MslsAdminIcon->set_href('867') 
#1 ***/wp-admin/includes/template.php(1456): lloc\Msls\MslsMetaBox->render_select(Object(WP_Post), Array) 
#2 ***/wp-admin/edit-form-advanced.php(716): do_meta_boxes(Object(WP_Screen), 'side', Object(WP_Post)) 
#3 ***/wp-admin/post.php(206): require('***...') 
#4 {main} thrown (file: ***/wp-content/plugins/multisite-language-switcher/includes/MslsAdminIcon.php, line: 160)

It should be an easy fix by just changing line 189 to:
$icon->set_href((int) $mydata->$language );
(file multisite-language-switcher/includes/MslsMetaBox.php)

Best regards