Same problem for me, I had this working on 2019R3 but now I have to move it to Mobile I am getting some issues
Might have to purchase your latest plugin Christian as I have 2 problems, the photos and Rect Screenshots
I won’t be back in the project I had this in until I finish moving another one to 2021.
Given the error message, I think it would be useful for someone at Xojo to respond.
Looks like your quotes around UIkit are wrong.
You should use " quotes, not “”
I bet this has to do with cutting/pasting code. It’s hard to catch.
Haha do you know what it was?
The quotes in the original post “UIKit” are different to the quotes in Xojo. When I removed them and retyped them it worked 
Good.