If you’re having persistent troubles with Craft failing to install or with the InVision Sync app not connecting or syncing properly, it could be related to use of a proxy. A proxy server acts as an intermediary between your computer and another server from which you are requesting a service (eg. accessing a website). Currently, InVision Sync and Craft Sync for Photoshop do not formally support proxies. Craft Manager does natively support proxies. However, it is still necessary to whitelist domains for Craft Manager if a network blocks domains by default.
This document provides an overview of possible issues with Craft or InVision Sync that could occur when using a proxy and walks you through how to troubleshoot and fix them. Please note that the symptoms described below aren’t only caused by proxies. At the same time using a proxy doesn’t automatically mean that you will experience these issues. There are many different types of proxies out there and not all of them will interfere with Craft and/or InVision Sync functionality similarly.
Affected Product Areas
Craft tools (especially Craft Sync)
Sketch crashing whenever using Craft Sync
Looking for Craft tools or Manager Updates results in error:
Installation fails completely (there are other reasons this may occur if not caused by a proxy)