jQuery.attrFn is deprecated

and 2 more

jQuery.isArray is deprecated; use Array.isArray Plugin:?Ninja Forms – File Uploads
/wp-content/plugins/ninja-forms-uploads/assets/js/lib/jquery.fileupload.js

jQuery.isFunction() is deprecated Plugin:?Ninja Forms – File Uploads
/wp-content/plugins/ninja-forms-uploads/assets/js/lib/jquery.fileupload.js

@kazumielite – Did you ever get a reply?

Can you update your Ninja Forms plugins to their latest versions and let me know if you continue to have the same issues?

For additional help with purchased add-ons, you will need to contact our official support. https://ninjaforms.com/contact
This rule is explained under the WP Support Forum guidelines: https://www.ads-software.com/support/guidelines/

I got this notice also recently:

Time: 2021-09-03 13:31:42
Notice: jQuery.attrFn is deprecated
Plugin or theme: Ninja Forms
File location: https://tipmrebuilders.com/wp-content/plugins/ninja-forms/assets/js/lib/jquery.mobile-events.min.js
Triggered on page: https://tipmrebuilders.com/wp-admin/admin.php?page=ninja-forms&form_id=25

Ninja Forms Version: v3.5.8.1