“Failed to load Project , incompatible project version” pop up appears when I open from code of xcode 9.3 in xcode 9.2

Question

If you can open the Project

You can simply change your Project Format (like the image)

Click to your Project File in xcode and change it

enter image description here

If you can’t open the project (projectName.xcodeproj) normally

Control-click on the project file, select Show Package Contents, and then open your project.pbxproj file and make the change for:

compatibilityVersion
objectVersion

For Xcode 10.0

compatibilityVersion: "Xcode 10.0"
objectVersion :51

For Xcode 9.3:

compatibilityVersion: "Xcode 9.3"
objectVersion :50

For Xcode 8.0-9.2:

compatibilityVersion: "Xcode 8.0"
objectVersion: 48

You can find the project.pbxproj file by right clicking the .xcodeproj file in the project folder, then select Show Package Contents