xcerror "Unable to get API_KEY from GoogleService-Info.plist."
You've run into a rare race condition during setup we're working to resolve. In the meantime, to fix the issue, you can re-download the GoogleService-Info.plist file. To do this, click on your project, then click the Gear icon in the top left of the screen next to your project name and select Project Settings (example screenshot attached). Next, select your app and click the button next to "Download the latest config file". Be careful when dragging the new config file into Xcode that the file has not been renamed to something like GooglerService-Info.plist (1). If it has, rename it back to GooglerService-Info.plist and you're good to go. Let me know if this resolves your issue.