View generated PDF within the app

[MackyZ]

Hi all

I'm having some trouble despite trying multiple tutorials and suggestions on similar posts, kindly someone assist as I can't figure out what exactly is wrong here.

First off, the Default app folder in GDrive is My Drive>BeytieApp

Then within the bot, file store is set to Default, Folder Path is set to Invoice, and a dynamic prefix is set (although I did try with a static one, same result).

Time stamp is disabled

another action in the bots sets a column (Invoice, column type is File), to the following expression

CONCATENATE("/BeytieApp/Invoice/",[Receipt No.],".pdf")

I have tried to follow step by step many guides, but all produce the same end result of getting this error:

'/BeytieApp/Invoice/2801.pdf' not found

Can anyone help? 

Edit: note that I'm currently prototyping this app, I'm still a free user, does that affect this?