I’m not able to upload a document in generate document in step

[PuckRas]

Currently we are working in a dev environement for Pega Sales Automation version ‘23 and we need to generate a document in a step. I know how to add all the properties and so on and wanted to upload the document. But I can’t upload the document it gives me 2 option buttons: Continue working or Delete adding. But the upload never appears. So is there some configuration that we have to do? I thought this is an OOTB feature and you can add your document. Or is it because we added an development application on top of our application?
Thanks in advance

[PuckRas]

It is working, I found the solution. I created a rule for my class in the Word Template and added the document there. From there I could select my document: