Hello Emmanouela,
In the microflow where you go to the Review_NewEdit page, you could already create the Review object, and set the association to the presentation input parameter. Next you can return this Review object at the end of the microflow, and use it as a page parameter on your Review_NewEdit page (which is probably already the case).
Also, when I look at the current microflow I think that the CurrentPresentation list you retrieve will be obsolete, because you already have your current presentation available as an input parameter in the top left of your microflow.
Kind regards,
Cas
As you are showing a review object on the popup page, your xpath looks wrong to me.
[MyFirstModule.Review_Presentation/MyFirstModule.Review/MyFirstModule.Review_Presentation/MyFirstModule.Presentation = '[%CurrentObject%]'] This is comparing your Currentobject (a review) with a presentation.
I think [MyFirstModule.Review_Presentation/MyFirstModule.Review = '[%CurrentObject%]'] should be the xpath you are looking for.
Or do you want to create a new review and show the presentation for which it was selected? In that case, you should create the review with a microflow and set the association in the create action. On your PopUp, you can make the reference selector read only as is is already selected in the microflow.