Error uploading file to Back-end Media Manager

Hello,
I am trying to upload a file (simple .jpg image of size 240kb) to Media backend using upload button and a function in .jsw module where code is directly copied from Corvid API reference guide for upload method ( https://www.wix.com/corvid/reference/wix-media-backend.mediaManager.html#upload ) , but it fails with an error in Console log :
“406 - {“error_code”:-7751,“error_description”:“Failed to get image info.”}”.
Can anyone help me a suggestion why this error appear ?

Thank you !!
Vasil

You will need to provide more information in order for us to assist you.

How are you doing this? How do you call the .jsw module?

Hello Yisrael,
On the front end I use upload button to select the file from my PC and normal button where on click I trigger following call to backend:
export function button1_click(event) {
if ($w(“#uploadButton1”).value.length > 0) {
uploadImagetest($w(“#uploadButton1”).value[0].name.toString())
}}
It seems to be wrong , but how should I do this ?

Best Regards,
Vasil