CocoaPods did not set the base configuration of your project because your project already has a custom config set

If you get a "CocoaPods did not set the base configuration of your project" warning, see this issue for more details:

Note that this is only a warning: you can still run the app.

It can solved directly in the Xcode project as explained in this comment.

Alternatively, add the following inside macos/Runner/Configs/AppInfo.xcconfig or ios/Runner/Configs/AppInfo.xcconfig:

#include "Pods/Target Support Files/Pods-Runner/Pods-Runner.debug.xcconfig"
#include "Pods/Target Support Files/Pods-Runner/Pods-Runner.release.xcconfig"
#include "Pods/Target Support Files/Pods-Runner/Pods-Runner.profile.xcconfig"