I am not able to open up the planet website at all. and so is my server with them! please check https://www.theplanet.com/ https://orbit.theplanet.com/ and my website ( https://www.trystwithtrees.com/ ) for it's reachability from various parts of the world I am posting here from Chandigarh in India.
Your post is one month old so I am not sure if my quick test will help you, however, I tried the link and it is working for me. It looks like the host had temporary downtime.