PHP 7.4 issue

Hi,
I love your plugin! Unfortunately since I updated to your version 2.4.0 I get error messages like this when I open the Loco Translate page in the backend (/wp-admin/admin.php?page=loco):
Deprecated: array_key_exists(): Using array_key_exists() on objects is deprecated. Use isset() or property_exists() instead in /.../wp-content/plugins/loco-translate/src/mvc/View.php on line 159

This seems to be an issue with PHP 7.4. As soon as I switch to PhP 7.3.9, the error messages are gone.
Best regards
Florian