Looks like the /silt command is blocked now as it seems to not be using https.

as a quick fix, i searched for http: and replaced it with https:   .. there were two instances.. it works now :)

Was just about to try that.  Good to know it's working for ya.  :)

Same for me, changed http://assets.imgix.net/... to https://assets.imgix.net/... and /silt works again.