Problem this Fieldname is not correct. It must be: file

[jAKErCZ]

Hi,
I need upload image and last froala this no problem and new froala this upload and error:
Fieldname is not correct. It must be: file

Php

     * @throws \Nette\Application\AbortException
     */
    public function ActionUploadImages()
    {
        // Store the image.
        try {
            bdump($_FILES);
            $response = \FroalaEditor\Image::upload(self::IMAGES_PATH);
            $this->sendJson($response);
        } catch (UniqueConstraintViolationException $e) {
            http_response_code(404);
        }
    }
And $_FILES dump
file => 
         name => "poradna_purenit_nebo_podezdivka.jpg"
         type => "image/jpeg"
         tmp_name => "C:\xampp\tmp\php496F.tmp"
         error => 0
         size => 142879
and initialize

var editor = new FroalaEditor('#board-content', {
            imageUploadURL: {plink Settings:uploadImages},
            language: 'cs',
            height: 500,
            // Change save interval (time in miliseconds).
           // saveInterval: 700,
            // Set the save param.
            saveParam: 'description',
            // Set the save URL.
           saveURL: {plink Settings:save},
            // HTTP request type.
            saveMethod: 'POST',
            // Additional save params.
            saveParams: { id: 'null'}
        });
            document.querySelector('#saveButton').addEventListener("click", function () {
                flashMessage('Dashboard byl uložen','success');
                editor.save.save();
            })
        });```

Please need help thx