Turbo-ios app works in iOS 17, fails before 16.4

Simple enough turbo app.

  • Everything works on 16.4 and after.

  • On 16.2 and 16.3, 15.5 the view load fails without logging any error, displaying a warning window containing a very nicely designed blue warning triangle, “Error loading page”, “The page could not be loaded due to a configuration error”. It doesn’t seem to matter what URL it tries to load.

Is this something known, or have I screwed something up? Can’t think of a search that yields anything useful.

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Demo app is doing the same.