PHP8.1: Passing null to parameter #2 ($string) of type string is deprecated in mailchimp_page_bottom()

See also 🐛 In php 8.1 the explode function throws a notice when default value is null Fixed

Thanks for reporting! Marking this as a duplicate of https://www.drupal.org/project/mailchimp/issues/3261477 🐛 In php 8.1 the explode function throws a notice when default value is null Fixed . A patch has been applied to resolve this issue and a number of other uses of explode in the module.