there, I get a warning on page in frontend: Warning:

Hi there,

I get a warning on page in frontend:

Warning: Missing argument 2 for apply_filters(), called in ....wp-content/plugins/custom-sidebars/inc/class-custom-sidebars-visibility.php on line 750 and defined in ...wp-includes/plugin.php on line 177

and also a warning at setup of widget (the same) in backend

It would be great if somebody could help me about that, apply_filters need at least two arguments, so one is missing

Greetings
Richard