Can't upload file while using File type column

[TankerChu]

I have an issue while using the File Type column. Basically, when I  upload a file, the Url should be [App Folder]/[Folder]/*.docx like the Image Type column.
But mine was "data:#filename=*.docx" and I can't seem to find it in the app folder or anywhere else in the Drive. Even when I tried to override it with the file folder path, the result is still the same.
And this happens to all my apps whether it's an old or newly created app.

[SkrOYC]

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[TankerChu · Accepted solution]

So I've figured out what is causing the problems. Apparently, I was testing uploading a file with a blank file which have nothing inside it. And Appsheet doesn't allow me to upload these kinds of files, these files must have something in them in order to upload.