We've just released a number of updates to address PHP 8.1 compatibility in some of our more popular plugins. These plugins are:
** Important note for Website Membership: If your front-end code was generated with WSM v1.08 (released October 29, 2012) or earlier may not be compatible with PHP 8.1. Generated code does not automatically update through plugin updates, so you will need to re-generate and replace any non-compatible code manually.
Please let me know if you have any questions, or if you use any plugins that are not in this list and would like to confirm if they are PHP 8.1-ready.