​Hello, 

I'm currently at 8/11 stars in the Bungle Wasteland and just bought three new lots. However, I can't build on any of them because I keep getting the error message "Arrival point blocked." 

No matter how big or small the building is, this error message appears as soon as I build an entrance. Is this a known bug, or is anyone else experiencing the same problem?

I had that same issue after buying new plots too. I ended up making a small building on the plot, so the message went away, then gradually expanded it afterwards, but it sounds like you've already tried that. 🤔 In my case I had used the whole plot to build, and I figured it was too big to allow for the pathing around it, so I scaled it down until the message went away and allowed me to finish the building. Have you tried using the smaller side entrance to see if it makes any difference? Sometimes that's worked for me.