Hey Everyone,
My friends at RedHat EOL'ed (end of lived) the service I was using to serve up the Lackey plugin. I Dockerized things and installed things on their new and improved offering. Long story short, you should update your Plugin Update URL to be...
http://hcsp-redemption-lackey-ccg.7e14.starter-us-west-2.openshiftapps.com/RedemptionQuick/updatelist.txt
Let me know if you see issues.