As harsh as it may sound, the Wix Toolset is such a steaming pile of garbage and waste of everyone's time who have had the misfortune to work with it that their best monetization strategy would be to charge for proper documentation and working examples, instead of playing games like "you can't view issues without paying us". Easily on of the worst pieces of software I've come across.

Alternative: https://github.com/oleg-shilo/wixsharp/