It looks like the example on https://slack.dev/bolt/concepts#creating-modals has type at the top level object but it should actually be nested in view as shown in https://api.slack.com/reference/block-kit/views
x in one of the [ ])x in each of the [ ])
Fixed in #289 (thanks @marks 馃槃)
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Fixed in #289 (thanks @marks 馃槃)