If you encounter plugin or theme error after you upgraded WordPress to 5.5, you need this plugin to fix the jQuery Migrate issue.
With the update to WordPress 5.5, a migration tool known as
jquery-migrate will no longer be enabled by default. This may lead to unexpected behaviors in some themes or plugins who run older code.
How To Fix It:
Download and Install the jQuery Migrate Helper on your WordPress website or blog.
This plugin serves as a temporary solution, enabling the migration script for your site to give your plugin and theme authors some more time to update, and test their code.