By default, the integration supports the Dawn theme and replaces the search form with an Algolia template. Other themes might require a configuration change for the autocomplete to work (however, please note that we cannot guarantee functionality with all Shopify themes.) Go to Search Options > Autocomplete > Customize and change the setting for CSS Selector to the selector for the search field in your theme.
To display results, Algolia uses the element matching the selector form[action=/search]. If your theme doesn’t include this element, go to Search Options > Autocomplete > Customize > CSS Selector and change the CSS selector to match your theme.
If you enable Algolia for collection pages and your theme doesn’t include the default .content-for-layout class, update the CSS Selector in Collection pages > Display settings > CSS Selector.
See the Frontend (UI/UX) guide for more information on configuring your frontend to help support your theme.