PHP 8.1 Error Deprecated

Our plugin uses the Freemius SDK, and their SDK returns deprecated warnings currently, but they can be ignored, as they are not fatal errors and cause no issues with the functionality of the site or plugin.

You can turn off WP_DEBUG to prevent displaying Notice and Warning messages, which is recommended on live production sites.

Their SDK will be updated over time to address any serious PHP 8 issues over time, but right now it's not recommended to use PHP 8 because many plugins will cause fatal errors, which are more severe than just expected deprecation warnings.