VPN connections are commonly used to allow access to corporate networks or to protect privacy. This means they control access to broader networks such as the wider internet.
Typically when working remotely you might be required to use a VPN to access company resources, some companies even pre-configure laptops to only connect to the internet via a VPN. Usually you will connect to a network (e.g. your home wifi) and then start a VPN client which effectively filters the traffic between your computer and the internet.
Sometimes a VPN or corporate networks can have specific rules that affect the communication between the Mac app and our servers, causing unexpected results.
If this happens, you may see that you cannot log in or register the Mac App, upload files or collaborate in real-time with others.
You can quickly check if this is the case by disconnecting from the VPN or corporate network (if possible) and connecting to the internet via a public network. If this resolves the issue, it’s likely that a VPN or corporate network is blocking some of the connections Sketch needs to work properly.
If you cannot switch connections, you’ll need to contact your network administrator or IT specialist in your organization and ask them to check if traffic is allowed in both directions (inbound and outbound) for the following list of endpoints: