Seeing a red frowning face when starting a lab or an error communicating with the server? Or a message saying your connection is unstable?
These can be caused by a number of factors. We will help you troubleshoot in this article.
The first thing to check is your connectivity to the labs. Visit this link https://labs.hol.vmware.com/hol/compatibility/ and perform the test. It is important that latency is under 300 ms. Take a screenshot of the results, send it to us in live chat, if all else fails.
Browsers will block content based on your browser security settings. Try to disable your Adblocker or try from a different browser. We support Firefox and Chrome.
Confirm that your network is not blocking content due to a firewall or a web proxy. Connect to a different network, just as a test. Corporate or educational networks can sometimes block WebSockets, which we need for a successful connection.
If you have a VPN or Proxy, please try disabling the VPN/Proxy and refresh/reload your browser to ensure HOLs is working directly through your Internet connection and not through your VPN or Proxy.
Please try these steps and contact us if help is still needed.