Overviewer 0.19.9 with Minecraft 1.18.2 world running markers script (--genpoi): "AttributeError: 'dict' object has no attribute '_name'"

[sethborg]

I'm using a world download via minecraft world downloader and getting this error when running the markers script.

  File "overviewer.py", line 653, in <module>
  File "overviewer.py", line 168, in main
  File "overviewer_core\aux_files\genPOI.py", line 601, in main
  File "overviewer_core\aux_files\genPOI.py", line 338, in handlePlayers
AttributeError: 'dict' object has no attribute '_name'

here's the genPOI.py section of code, with the offending line 308 being 3rd from the bottom "data._name = playername":

        playername = playerfile.split(".")[0]
        if isSinglePlayer:
            playername = 'Player'
        data._name = playername
        if useUUIDs:
            data['uuid'] = playername

[ajh123]

The main README states ..

PLEASE NOTE: Overviewer is currently unmaintained. PRs will not be merged and issues will not be addressed. The website and repository will remain online and accessible.

Instead please use the new working (“successor”) version of Overviewer supporting 1.20 worlds and textures.
https://github.com/GregoryAM-SP/The-Minecraft-Overviewer