In the latest version 1.5.9x there is a problem in IOS, due to optimizing code for better performance. (delegating reflection tasks at runtime, but ios can’t compile at runtime)
Please either use version 1.5.8 until I release the fix to that (very soon), or if you don’t need building to ios right now, continue with 1.5.9x in editor and update to latest fix when it’s released.