I Tried:
$ rm -rf ios
$ exp detach
$ cd ios
$ pod install
[!] CocoaPods could not find compatible versions for pod "ExpoKit/GL":
In Podfile:
ExpoKit/GL (from `http://github.com/expo/expo.git`, tag `ios/2.7.0`)
None of your spec sources contain a spec satisfying the dependency: `ExpoKit/GL (from `http://github.com/expo/expo.git`, tag `ios/2.7.0`)`.
You have either:
* out-of-date source repos which you can update with `pod repo update` or with `pod install --repo-update`.
* mistyped the name or version.
* not added the source repo that hosts the Podspec to your Podfile.
Note: as of CocoaPods 1.0, `pod repo update` does not happen on `pod install` by default.
I Also Tried Tried, create New App in XDE SDK 29:
$ exp detach
$ cd ios
$ pod install
Result Error
[!] Invalid `Podfile` file: `${' is not allowed as a global variable name
/Users/i9xp/Documents/GitRepos/my-new-project/ios/Podfile:14: syntax error, unexpected end-of-input, expecting keyword_end.
By Removing Erred Line come back to First Error.