How do I compile a successful build in xcode?

I am trying to get a ios game build in Xcode, but it fails and gives me two errors:

Run script build phase 'Copy www directory' will be run during every build because it does not specify any outputs. To address this warning, either add output dependencies to the script phase, or configure it to run in every build by unchecking "Based on dependency analysis" in the script phase.

And

The sandbox is not in sync with the Podfile.lock. Run 'pod install' or update your CocoaPods installation.

Does anybody know what I should do?

Best regards,

Tor M