PNG Optimizer

Hi all, I am getting the following error:
I installed home-brew -
pngquant and I believe I set the path for home-brew correctly
/usr/local/bin

any help is appreciated
error message follows:

MACRO ERROR  on  2017-02-27 09:18:37

This info was pulled from the KM Engine Log for the
Last Macro error that occured.

Macro: Trying
Action: Search Variable ‘pqScriptOut’ Using Regular Expression (case sensitive)
Status: cancelled
Error: Search Variable failed to match (?m)-color image as (.*?)$

Log File: ~/Library/Logs/Keyboard Maestro/Engine.log