IOS project showing error “An internal error occurred. Editing functionality may be limited” on xcode 7.1

Question

I just created one new cordova ios project via CLI, and i opened that project in Xcode 7.1 and while running on simulator am getting some error on mainViewController.xib, if

Answer 1

Xcode 7.3.1

In my case, the error was caused by the following line:

print("|" + board[x][y])

Changed to:

print("| \(board[x][y])")

After that, I did a Product -> Clean (Command+Shift+K) That fixed the issue.

PS: board[x][y] is a [[Character]], if that matters. I copy-pasted my Java Class into Xcode to edit it into Swift.