Error when passing in empty values for filter fields

[bryce13950]

The following error was generated...

[2024-06-10 15:01:32] local.ERROR: explode(): Argument #2 ($string) must be of type string, null given {"exception":"[object] (TypeError(code: 0): explode(): Argument #2 ($string) must be of type string, null given at /code/app/Http/Middleware/SearchFilterParsingMiddleware.php:91)

with this query filter...

?filter[slug]=&expand[children]=*

The middleware should verify values passed in, and return 401 if values are empty.