Cannot cast mixed to string.

Parameter #1 $str of function sanitize_text_field expects string, mixed given.

Function perflab_query_plugin_info() should return array{name: string, slug: string, short_description: string, requires: string|false, requires_php: string|false, requires_plugins: array<string>, download_link: string, version: string}|WP_Error but returns mixed.

Parameter #2 $array of function implode expects array<string>, mixed given.

Parameter #2 $pieces of function implode expects array, mixed given.

Cannot access property $queries on mixed.

Cannot access offset 1 on mixed.

Cannot access property $queries on mixed.

Cannot access offset 1 on mixed.

Argument of an invalid type mixed supplied for foreach, only iterables are supported.