One day on my private server, I randomly decided to craft and place an inverted sky block in my world cause I thought it would look cool. Right after I placed it, my client crashed. The server stayed though, just my client. After reopening DW20 1.7 and getting back on the server, my client crashed again, and again, server stayed fine. I'm not sure if my friend's client will crash too because he hasn't got on today yet. How can I get back in without crashing (I've already tried 3 times)?! Do I have to somehow remove the block from the world without actually being in the game? And if I do, how? Btw, I host the server.