Matteo Pagani - Thanks for this post. I've been following the work from the app consult team very closely as I love using the new technologies you all come out with for UWP. I ran into this error after upgrading my Windows to 19H1 and I've since halted development on upgrading my desktop bridge app(s) to use XAML Islands since I've had numerous issues using the preview and it didn't seem worth it to continue developing for an OS release version that most of my users will not use for a while. However, I'm very glad to see work is still being put into these technologies. I have a couple questions which may affect the priority of the work in my apps and maybe you can answer them for me:
1. If I'm required to also upgrade my package to build 18351, does that mean there will never be support for XAML islands earlier than that build (like for OS version 1809)?
2. When is XAML island's anticipated release date and when can I expect to be publishing apps with XAML islands to the Windows Store?