When you click your name / avatar on the US Forums, the View Profile link will attempt to take you to your US Armoury page which, in your case, is…
https://us.diablo3.com/en-us/profile/MerLock-1557/
…which will fail to load, and give you a message that the profile doesn’t exist.
The reason for this is because, a few weeks ago, the Armoury URLs were changed to include the word blizzard in them, and the actual URL for your US Armoury page is…
https://us.diablo3.blizzard.com/en-us/profile/MerLock-1557/
However, this brings us to the fact that, as the numeric portion of your Battlenet shows, your home region isn’t the US. (The first digit indicates home region, 1 = USA, 2 = EU, etc). So, the page has links to Europe and Asia. The links on that page point to…
EU…
https://eu.diablo3.blizzard.co/en-us/profile/MerLock-1557/hero/687254
Asia…
https://kr.diablo3.blizzard.co/en-us/profile/MerLock-1557/hero/687254
These pages will give you an error of “This site can’t be reached” and, if you look closely at the URLs above, you may see why. Yes, they missed off the m from .com in the URLs. The actual URLs for your EU and Asia profiles are…
EU…
https://eu.diablo3.blizzard.com/en-us/profile/MerLock-1557/hero/687254
Asia…
https://kr.diablo3.blizzard.com/en-us/profile/MerLock-1557/hero/687254
However, looking at all three region’s Armoury sites, I can’t seem to see your profile.
Is it a long time since you logged into the game and started a game session?
The fault with the Forum’s View Profile links not pointing to valid URLs was reported almost two months ago…