Sketch Can't Upload or Collaborate (VPN, Proxy, Firewall)

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Workaround available macOS Updated November 13, 2026How we research

Quick answer

A VPN, proxy or firewall can block Sketch's servers, breaking login, uploads and real-time collaboration. Test on another network, then ask IT to allow Sketch's endpoints.

Most likely fix: Test another network

How to fix it

Try these in order — the most common fix is first.

  1. 1. Test another network

    1. Disconnect VPN or join a public network; if it works the corporate network is blocking Sketch
    Did this fix it?
  2. 2. Ask IT to allow endpoints

    1. Allow inbound and outbound traffic to api.prod.sketch.com, capacitor.prod.sketch.com, graphql.sketch.cloud, presence.prod.sketch.com, payments.prod.sketch.com, download.sketch.com and the others listed in Sketch's network settings article
    Did this fix it?

Symptoms

Cannot log in, register, upload files or collaborate.

Why it happens

  • VPN
  • Proxy
  • Firewall

This guide also covers

  • sketch vpn
  • sketch can't upload workspace
  • sketch firewall

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