This issue has been resolved as of 3/7/2017! As of yesterday, March 4th, all new maps uploaded to our site have failed to render. I have since addressed this issue to Skeight via email, but this issue may not have a resolution immediately. I apologize for any inconvenience this has caused. Please note, however, that though your map may not be rendered, you and other visitors should still be able to download it. When uploading your map, you may encounter either of these two known issues. Issue 1 A red error dialog box will appear, with the message "Couldn't find file: level.dat!". This message will appear even if your level.dat is not missing from your uploaded world. Your render will display nothing but a compass in the center. Issue 2 Your render will not show up at all, only showing a white box. All further updates on this issue will be posted here.