I keep getting the following error when trying to deploy a theme.

[12:42:42] Error in task gulp theme:deploy
Error Message
  rp[options.method.toLowerCase(...)] is not a function
Error Details

I have tried updating to the latest toolset deleting all the temporary files and folders

DeployDistribution

,

LocalDistribution

,

node_modules

,

gulp/config/config.json

,

.nsdeploy

,

payload.json

and then reinstalling node packages. I have tried

gulp theme:fetch

to pull the theme as it exists and then

gulp theme:deploy

without changes. Anybody run into this or have ideas on how to fix?