ArgumentError - [Xcodeproj] Unable to find compatibility version string for object version 70.

[mattgapadmi]

I am receiving this error after updating my .pbxproj file using Xcode 16.0:

ArgumentError - [Xcodeproj] Unable to find compatibility version string for object version 70.

I'm using xcodeproj 1.27.0

I noticed this in lib/xcodeproj/constants.rb:

COMPATIBILITY_VERSION_BY_OBJECT_VERSION = {
      77 => 'Xcode 16.0',

This doesn't seem right. I thought 70 is Xcode 16.0 and 77 is Xcode 16.1.

Any help would be appreciated.

[DhanushKumar19]

I got this error on pod install when I created a directory as a folder (e.g., a Blue Icon) within the project. Converting the folder to a group (e.g., a Grey color icon) resolved the issue for me.

[iAmrMohamed]

I had the same issue and converting the folder to group fixed it too, thanks @DhanushKumar19.