copy and paste this into your URL bar:
blockland://join-72.181.238.141_28000
unless on chrome.
when pasted, it'll pop-up a few suggestions. one should be blockland://join-72.181.238.141_28000 with a magnifying glass to the left of it, and the other blockland://join-72.181.238.141_28000 with a globe to the left of it.
click the one with the globe and it'll work