Fatal error exit status 1

Hello,

I'm using a Mac 10.14.4, and keep getting this error message when I try to verify my program. I looked online and haven't found a suitable solution. The files show up in the library. Can someone please help?

thanks!

Arduino: 1.8.9 (Mac OS X), Board: "Arduino/Genuino Uno"

Arduino/libraries/WAV-Trigger-Arduino-Serial-Library-master/wavTrigger.h:79:44: fatal error: ../AltSoftSerial/AltSoftSerial.h: No such file or directory
compilation terminated.
exit status 1
Error compiling for board Arduino/Genuino Uno.

This report would have more information with
"Show verbose output during compilation"
option enabled in File -> Preferences.

The issue has been solved!! Thanks anyway!

enitsi:
The issue has been solved!! Thanks anyway!

It's always useful to post the solution for others that encounter the same problem.