php warning on 404 page

Hi,

because you are preparing new version – maybe you could fix this too:
– on 404 page there is PHP warning Attempt to read property “ID” on null in maxx_psp_generate_breadcrumb_schema() on this     ‘name’             => esc_html( get_the_title( $post->ID ) ),
You are not checking if global $post is available a on 404 page is not.

Thanks, you did awesome job. Continue please.