After trying so many things. I would like to share what worked for me.
Goto Library/Developer/XCode and delete "DerivedData" folder.
Clean Build Folder : in xcode "Product" menu -> "Clean Build Folder" or press "Command+shift+K".
Close XCode.
Re-open XCode and your project.
Try creating new build.
Topic:
Developer Tools & Services
SubTopic:
Xcode
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