This is the standard page that is installed on a domain if it has been registered via TransIP but is not pointing to a website. The owner can set up the domain to point to its own server or add content to his / her website (if this website is hosted at TransIP) after which the message will disappear.

Is this the page you see rather than the website you are expecting? In that case the owner probably transferred the domain to TransIP recently but has not yet set it up correctly. You can try again later or contact the domain owner via another route.