In some scenarios, BigPipe causes ajax errors where drupalSettings.ajaxTrustedUrl is undefined at https://git.drupalcode.org/project/drupal/-/blob/10.1.x/core/misc/ajax.j...
Uncaught TypeError: Cannot read properties of undefined (reading '') at new Drupal.Ajax
This is a strange one - we have observed this on a search API page, with facet blocks
For some search terms, the facet blocks do not appear, and the JavaScript error appears in the console.
For other terms, the page loads as expected, with no errors in the console. In that scenario, drupalSettings.ajaxTrustedUrl is populated with the current page URL.
With the BigPipe module disabled, the error does not occur.
Other modules enabled which may be relevant:
* better_exposed_filters
* facets
* search_api_autocomplets
* views_ajax_history
TODO: check whether the issue is actually caused by one of these modules, or by custom code
Closed: duplicate
10.1 ✨
This seems very similar to 🐛 BigPipe doesn't display a block in a specific language Closed: works as designed . Moving your issue summary there as a comment and crediting you, as well as responding 👍