"Please select evidence for the field" message in Document Understanding Framework

@supermanPunch

I checked the document Text output. It contains JSON content consisting of box positions and the words. The snapshot of the output document text is below. Since it contains position data I thought I could use the Position-based Extractor. But the Position-based extractor is not available in my environment despite installing the required packages and following the instructions on this forum thread (where I have posted a third-problem):

I have built two projects from scratch using two different PDF documents thinking that the documents might be the problem. But in both cases the project ends up with the error message.

Document Text output confirms words extracted with position information:

Required Packages Installed after selecting Pre-Release Option:

Position-based Extractor not available in Studio!

Thanks for your help!

Andy