https://bugs.winehq.org/show_bug.cgi?id=56443
--- Comment #14 from Somewhat Cold 6chars@proton.me --- (In reply to Zeb Figura from comment #13)
I would not recommend Wine-Staging unless you have something that specifically needs it, personally.
As a maintainer of Wine-Staging and the person who ends up responding to most bug reports, I can say that I will almost always ask if the bug is present in upstream Wine as well—since we basically want Wine bugs to be under Wine and Wine-Staging bugs to be under Wine-Staging. The latter are very specifically my responsibility, and I'd like to shunt off that responsibility whenever I can ;-)
So while we accept Wine-Staging bug reports, filing a report where only Staging was tested will generally result in a request to test upstream anyway, unless I can find a clear sign that the bug is in one place or the other.
With that said, I don't think Ken Sharp's question of "why are you using Staging" is very useful. The answer is generally "because it's commonly perceived to have more features than upstream Wine". I think that perception is not (anymore) very true, and in any case Staging is mostly targeted fixes for known applications anyway. But just asking "why" is not really an efficient way to communicate that fact.
Got it. The WINE maintainers would like to focus more on Dev, so that bug reporting and fixing is more practical. Staging is more like "We've seen your bug report from Wine-Dev version X.X, and we might have a fix for it on Staging. Try your app now on Staging and report back." So if that fix would work on Staging, it would get implemented into Dev, eventually. I hope I got it right.
So, unless someone hasn't tested a Windows app on Dev, there's no point in directly going to Staging. It should be tested in Development versions first of all. As for the perceived extra features, that's why I initially used Staging, yep. Just out of recommendation, word of mouth, or some app I'm using that's also using Windows apps. But I'm going to use Dev from now on, and use Staging only if I really need to, if something would only work on Staging and not Dev. Anyway, thank you for the information, and for being friendly :)
I will now attach a log regarding this launcher, but this time actually in Wine-Devel 9.6. Unfortunately, I get the same error message.