I am not sure how to fix or configure my computer to overcome this error and it is preventing me from performing several tasks including uploading to my shinyapps.io cloud server.
> devtools::install_github('rstudio/shinyapps')
Error in curl::curl_fetch_memory(url, handle = h) :
Unsupported proxy 'https://localhost:1410/', libcurl is built without the HTTPS-proxy support.