java error

Hi

I got a site with a theme specifically developed by an agency.

I wanted to add the plugin “Drag and Drop Multiple File Upload – Contact Form 7” but it does not work.

I encounter a java error. Can you tell me how to fix this?

Uncaught TypeError: e.ajax is not a function
    at File.<anonymous> (codedropz-uploader-min.js:10:3256)
    at Function.each (jquery-3.2.1.slim.min.js:2:2919)
    at l (codedropz-uploader-min.js:10:2430)
    at HTMLDivElement.<anonymous> (codedropz-uploader-min.js:10:1888)
    at HTMLDivElement.dispatch (jquery-3.2.1.slim.min.js:3:10551)
    at HTMLDivElement.q.handle (jquery-3.2.1.slim.min.js:3:8578)