Widgets page freezes

WPML CMS freezes whole /widgets.php page. You see the page but no buttons/arrows works there. Here is what Console says:

Unchecked runtime.lastError: The message port closed before a response was received.
widgets.php:1 Unchecked runtime.lastError: The message port closed before a response was received.
widgets.php:1 Unchecked runtime.lastError: The message port closed before a response was received.
load-scripts.php?c=0…,wp-hooks&ver=6.0:5 JQMIGRATE: Migrate is installed, version 3.3.2
widgets.php:1 
 Failed to load resource: the server responded with a status of 500 ()