How can I fix Apple developer when it s error now?

Please provide some information. Just saying "it doesn't work" is not enough.

• What are you trying to do ?
• What happens ?
• What did you expect ?
• What is the exact error message ?
• What is your configuration (OS version, Xcode version…)

/Users/Kingsley/Desktop/Xcode flies/slide/slide/Preview Content/Preview Assets.xcassets/Contents.json