I had this same problem with mine. The tutorial instructs you to name it UTUI_Scenes_PlayerTweak, but my log files fired off errors that it couldn't find UI_Scenes_PlayerTweak. I simply renamed the package to UI_Scenes_PlayerTweak (less the "UT" prefix) and it worked fine. I think the ini file is what is driving that request. I know that in many cases that UT extension is something that is added in, but in this case putting it in there yourself and not specifying it in your code causes some problems.
I also had quadruple checked myself on my errors before posting this and was only able to fix it by changing the package name from the UT prefixed version. Thank you for the great tutorial. It will no doubt help me. Take care.
Sentientv2
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