Error Installing Google Maps Native Plugin in with Ionic

Well, I tried that, but it is still not working. What I realized is, it generates this error only if IOS platform is added.
I tried adding the platform first, and then adding the plugin and it gives the error.
Then, it does the same thing when I reverse the process, but it works very fine between Android plaform and the plugin.
So, it is only a problem of IOS and the plugin. Any help?