Is “S_AkComponent” one of your sounds that is not working? You might want to try reimporting it into the engine or resaving it.
UATHelper: Packaging (Windows (64-bit)): UE4Editor-Cmd: [2017.01.12-15.28.02:174][ 0]LogInit:Display: LogLinker:Warning: Asset '../../../../../../Users/Simon/git/droneracer/Plugins/Wwise/Content/S_AkComponent.uasset' has been saved with empty engine version. The asset will be loaded but may be incompatible.
There are a bunch of other warnings in that log file as well. You may want to search for “warning” and read them all and see if they give you some good clues.