Illegal Configuration: Compiling IB documents for earlier than iOS 7 is no longer supported

I recently updated to XCode 9. When I build the app it says "illegal configuration" for some storyboards in my pod files. I tried to recreate the storyboard files but it doesn't help.

Solution 1:

XCode 9 will not support storyboards that are built for iOS version less than 7.

Try changing the Builds for in File Inspector to a higher version then Clean and Build.

See screenshot

Edit: Important info from @user435779 below: Restart XCode if the errors don't go away.

Solution 2:

Simply set the deployment target to 8.0 + in General to fix this issue. No need to go through each xib file.

Solution 3:

As storyboard in Xcode 9 will not support which is below iOS 7.0, so you need to update the iOS version in File inspector.

For more information please find the below GIF representation.

Hope it works!!!