Error message on English subpage (Plugin: Polylang)

Dear Brizy-Team,

it is currently not possible to access any english subpages on our website.
Here is an example: https://www.uhlala.com/en/home/unpinked-en/ 

I get the following error message:

Fatal error: Uncaught TypeError: BrizyPro_Content_Placeholders_MenuLoopSubmenu::hasSubMenu(): Argument #2 ($id) must be of type int, string given, called in /homepages/23/d667381552/htdocs/uhlala2020/wp-content/plugins/brizy-pro/content/placeholders/menu-loop-submenu.php on line 24 and defined in /homepages/23/d667381552/htdocs/uhlala2020/wp-content/plugins/brizy-pro/content/placeholders/menu-loop-submenu.php:33 Stack trace: #0 /homepages/23/d667381552/htdocs/uhlala2020/wp-content/plugins/brizy-pro/content/placeholders/menu-loop-submenu.php(24): BrizyPro_Content_Placeholders_MenuLoopSubmenu->hasSubMenu() #1 /homepages/23/d667381552/htdocs/uhlala2020/wp-content/plugins/brizy/vendor/bagrinsergiu/content-placeholder/lib/Replacer.php(66): BrizyPro_Content_Placeholders_MenuLoopSubmenu->getValue() #2 /homepages/23/d667381552/htdocs/uhlala2020/wp-content/plugins/brizy/vendor/bagrinsergiu/content-placeholder/lib/Replacer.php(44): BrizyPlaceholders\Replacer->replaceWithExtractedData() #3 /homepages/23/d667381552/htdocs/uhlala2020/wp-content/plugins/brizy-pro/content/placeholders/menu-loop.php(59): BrizyPlaceholders\Replacer->replacePlaceholders() #4 /homepages/23/d667381552/htdocs/uhlala2020/wp-content/plugins/brizy-pro/content/placeholders/menu-loop.php(71): BrizyPro_Content_Placeholders_MenuLoop->loop() #5 /homepages/23/d667381552/htdocs/uhlala2020/wp-content/plugins/brizy-pro/content/placeholders/menu-loop.php(21): BrizyPro_Content_Placeholders_MenuLoop->handleMenuLoop() #6 /homepages/23/d667381552/htdocs/uhlala2020/wp-content/plugins/brizy/vendor/bagrinsergiu/content-placeholder/lib/Replacer.php(66): BrizyPro_Content_Placeholders_MenuLoop->getValue() #7 /homepages/23/d667381552/htdocs/uhlala2020/wp-content/plugins/brizy/vendor/bagrinsergiu/content-placeholder/lib/Replacer.php(44): BrizyPlaceholders\Replacer->replaceWithExtractedData() #8 /homepages/23/d667381552/htdocs/uhlala2020/wp-content/plugins/brizy/content/placeholders/group-placeholder.php(47): BrizyPlaceholders\Replacer->replacePlaceholders() #9 /homepages/23/d667381552/htdocs/uhlala2020/wp-content/plugins/brizy/vendor/bagrinsergiu/content-placeholder/lib/Replacer.php(66): Brizy_Content_Placeholders_GroupPlaceholder->getValue() #10 /homepages/23/d667381552/htdocs/uhlala2020/wp-content/plugins/brizy/content/dynamic-content-processor.php(29): BrizyPlaceholders\Replacer->replaceWithExtractedData() #11 /homepages/23/d667381552/htdocs/uhlala2020/wp-content/plugins/brizy/content/main-processor.php(46): Brizy_Content_DynamicContentProcessor->process() #12 /homepages/23/d667381552/htdocs/uhlala2020/wp-content/plugins/brizy/editor.php(382): Brizy_Content_MainProcessor->process() #13 /homepages/23/d667381552/htdocs/uhlala2020/wp-includes/class-wp-hook.php(326): Brizy_Editor->brizy_content() #14 /homepages/23/d667381552/htdocs/uhlala2020/wp-includes/plugin.php(205): WP_Hook->apply_filters() #15 /homepages/23/d667381552/htdocs/uhlala2020/wp-content/plugins/brizy/public/main.php(401): apply_filters() #16 /homepages/23/d667381552/htdocs/uhlala2020/wp-includes/class-wp-hook.php(324): Brizy_Public_Main->insert_page_content() #17 /homepages/23/d667381552/htdocs/uhlala2020/wp-includes/plugin.php(205): WP_Hook->apply_filters() #18 /homepages/23/d667381552/htdocs/uhlala2020/wp-includes/post-template.php(256): apply_filters() #19 /homepages/23/d667381552/htdocs/uhlala2020/wp-content/plugins/brizy/public/views/templates/brizy-blank-template.php(37): the_content() #20 /homepages/23/d667381552/htdocs/uhlala2020/wp-includes/template-loader.php(106): include('/homepages/23/d...') #21 /homepages/23/d667381552/htdocs/uhlala2020/wp-blog-header.php(19): require_once('/homepages/23/d...') #22 /homepages/23/d667381552/htdocs/uhlala2020/index.php(17): require('/homepages/23/d...') #23 {main} thrown in /homepages/23/d667381552/htdocs/uhlala2020/wp-content/plugins/brizy-pro/content/placeholders/menu-loop-submenu.php on line 33

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I use the plugin polylang for the Translations. 
All plugins are up to date. 

Can you help out here, please?

Thank you!