What does the error "wordpress Datatables provided by API: '$' is undefined" mean?

edit

This error means that the jQuery library is not loaded or is not properly installed on the WordPress website. The Datatables plugin depends on jQuery library, and if it is not available, the error message "datatables provided by API: '$' is undefined" will appear. To solve this issue, you need to ensure that jQuery is loaded before loading the Datatables plugin. You can do this by either including the jQuery library in your custom WordPress theme or by using a plugin that loads jQuery on your website.