Are you taking about iPad Playgrounds? There you need to be updated to the latest version and new App projects will be 5.9. Older projects created with 5.8 version will stay as 5.8. To update those you’d need to create a new 5.9 project and copy/paste over the code and assets. Or possibly you could open the Package file and update the version there. I haven’t done that so can’t say if it’ll work or what the caveats/risks are.

Have you tried rebooting the device? iPad Playgrounds crashing used to be a common concern for me. At that time I was using a 1st gen iPad Pro and it would crash always if I used a // style comment, and crash often if I edited a String literal. (I contacted the devs about this but couldn’t produce some system log to their satisfaction and they couldn’t reproduce so nothing came of it). Now, about 4 months ago I got a pretty pimmped out iPad and MacBook and iPad Playgrounds has been working great. No crashes… until oh no, it was a couple weeks ago iPad Playgrounds started crashing anytime I entered a ClosedRange like 0…5. OMG! I just spent 2k on this device specifically for iPad Playgrounds and it’s crashing again. Woe is me. Confirmed that in a brand new App project typing… let i = 0… …then finishing that with 5 it would crash, always. NOOOOO. Despair. But I rebooted the device and, welp, I can type ClosedRanges again 🤷‍♀️. It hasn’t crashed again since rebooting🤞 On the MacBook I haven’t really used the 2 different ‘Playgrounds’ available except to see what they are (the ‘Playgrounds’ project type in Xcode and the ‘Playgrounds’ app available on Mac). Neither crashed in the little that I used them. So I don’t know why it crashes but a reboot seems to help in the one time it started crashing in iPad Playgrounds on my modern device (rebooting doesn’t help on my 1st gen iPad Pro though).

The live result is automatically shown when the file has a preview block #Preview { MyView() }