wp.media is not a function

Hey there,

I really love Enfold! It’s the best Theme on the marked.
I have installed Woocommerce with the Plugin Uni Woo Custom Product Options.
In the Backend I can modify the Product Page as I want and the new calculation works very fine.
But I can’t set an Image for example.
Wem I activate a twenty seventeen theme, all works well.
In the Browser Console I get this Error:

TypeError: wp.media is not a function. (In ‘wp.media({
frame: ‘post’,
state: ‘insert’,
multiple: false
})’, ‘wp.media’ is undefined)

This is in the builder.js in line 5256

Maybe you can help me?
Thanks,

Markus