Steps to Fix:

1. Convert to Group:

• In Xcode, right-click on your project folder and choose Convert to Group from the menu.

2. Modify Project Settings:

• Right-click on your projectname.xcodeproj file and select Show Package Contents.
• Open the project.pbxproj file in a text editor. Remove the following lines:
• minimizedProjectReferenceProxies = 1;
• preferredProjectObjectVersion = 77; Update the version number by changing:
• Change objectVersion = 77; to objectVersion = 56;

If you have tests also convert them to group


made a video for this fix check it out https://youtu.be/WUvW3in1QVs