Not able to Upload files using Page in oracle apex application

Summary

Not able to Upload files using Page in oracle apex application

Content

Hi,

We are trying to upload files using page which has file browser and submit.
We are reffering the below source to achieve this.

Url: https://docs.oracle.com/cd/E14373_01/appdev.32/e13363/up_dn_files.htm#CJAFCIEH

We have run the application in the debug mode.
We didn't get any errors in performance check result.

In reference source ,region type mentioned like HTML.

For Region:

Identify the type of region to add to this page - Accept the default, HTML, and click Next.

Select the type of HTML region container you wish to create - Accept the default, HTML, and click Next.