Index file is completely blank.

[AngeloBur]

When i launch the index file it is just black. Cant see my world render, I know it worked because it took like 1 hour to load it. So why cant I see my map?

[CounterPillow]

because the project is abandoned and doesn't work for newer Minecraft versions. Please see https://overviewer.org/blog/2023/5/9/the-end/
or the bold part of the readme

[JoshuaMarti]

@AngeloBur in case you're interested we're continuing to maintain this project at https://github.com/GregoryAM-SP/The-Minecraft-Overviewer and the latest releases fix the all-black world map issue.