Unable to save custom pages


When I have designed a custom page I am unable to save my custom filters in the widget layouts.

I have a custom filter to handle Assets:

If I try to modify the page, or save the updated layout I get a message that I need to fix and disable this filter, first:
Screen Shot 2022-09-08 at 9.47.39 AM

Am I not allowed to save the custom filters of a designed of a custom page? Kind of the whole point of custom filters and designing a page to the way I want the information displayed.