Help with advanced query with AND and OR in it

Customization Look what I built
1

I’m trying to form an advanced query which returns either (a) tasks marked DOING or (b) tasks scheduled before tomorrow marked TODO.

My best guess is:

#+BEGIN_QUERY
{:title "🔨 ACTIVE"
   :query [:find (pull ?b [*])
          :in $ ?tod
          :where
          [?b :block/marker ?marker]
          (or [(contains? #{"DOING"} ?marker)]
                (and [(contains? #{"TODO"} ?marker)]
                         [?b :block/scheduled ?d]
                         [(<= ?d ?tod)]))
          ]
   :inputs [:today]
 :result-transform (fn [result]
                       (sort-by (fn [h]
                                    (get h :block/priority "Z")) result))
 :breadcrumbs-show? true
 :collapsed? false}
#+END_QUERY

However, I get a Block Render Error.

Can anyone shed light on what I’m doing wrong?