This function works just fine on my test website.
There is a possibility that you have some plugin conflict that causes this.
Please deactivate all the active plugins temporarily,(except the woocommerce and Vision Core) then check if the cart works.
Then if the cart works, activate the plugins one by one until the problem reoccurs. in that way you can find the problematic plugin(s).
Please let us know if you find that there is some sort of conflict so we can fix that.
If you tried the above solution and still no success, please give me your WP Login Credentials so I can check the problem by my self.
Also, please try to restart the Cart menu Icon from the Customizing ▸ WooCommerce ▸General menu.