The error is “No select2/compat/dropdownCss” at line 1361 of
/wp-content/plugins/wp-user-avatar/assets/select2/select2.min.js
I think there is a conflict given by duplicate names between this file and an object in
/wp-content/plugins/advanced-custom-fields-pro/assets/build/js/acf-input.min.js
or
/wp-content/plugins/advanced-custom-fields-pro/assets/build/js/acf.min.js
The same error occurs both in the ACF editor when adding a “post object” field and in the page editor where this field appears.
