Hi @Makena
We're glad you're here. When you get a chance, please introduce yourself on this forum thread. I'd also encourage you to add a real picture as your avatar because it helps build community!
I think in row 20 you need to use selected(${selected_country_Country}, 'tanzania')
not selected(${selected_country}, 'Tanzania')
because that's how it's represented in XML form after converting.
But to be honest it's my first time I see that cascading_select question
type. In our docs cascading selects are represented by separate select questions https://xlsform.org/en/#cascading-selects
where did you come across documentation for that cascading_select? I found this topic Cascading Select conflicting - #6 by A.N.M_AL-IMRAN and it was also a mistery.