File Upload Error 200 (Invalid Authentication Token)

Hello, as the title said, I was not able to upload a file and save it on the database.
File Upload Button and Submit Button is connected already on the database.

Question: Where or How do I generate this required token? Found an tutorial video that has an upload button, but it seems that its not working on me.

Another Question: How to do this in Wix Code?

Wix Error:

Current Subscription, not sure about the Ascend User thing though.

Check your code against the Wix tutorial here.
https://support.wix.com/en/article/how-to-use-the-upload-button-with-code
https://www.wix.com/corvid/reference/$w.UploadButton.html

You can also do it through Wix Forms.
https://support.wix.com/en/article/adding-a-file-upload-field-to-your-form