That's a failure in the screenshot process detailed here: https://www.codenameone.com/manual/appendix-ios.html
I'm guessing your first form is a dialog or has a delay/connection logic. If you post the full log it might contain details pointing at that. The first form of the app needs to be very simple, at least the first time the app is launched. -- You received this message because you are subscribed to the Google Groups "CodenameOne Discussions" group. To unsubscribe from this group and stop receiving emails from it, send an email to codenameone-discussions+unsubscr...@googlegroups.com. Visit this group at https://groups.google.com/group/codenameone-discussions. To view this discussion on the web visit https://groups.google.com/d/msgid/codenameone-discussions/5b3fc692-3158-4363-9a3f-43f351a2df03%40googlegroups.com. For more options, visit https://groups.google.com/d/optout.