It was indeed File.exist? v File.exists? which had worked side-by-side for decades, but in v2024's Ruby only the former works !
This has affected lots of older or lesser used plugins...
v2.0 is now available in the PluginStore.
I also fixed somethings that were archaic in the code - like not having its own namespace etc.
It's now signed etc.
Get it here ...
https://sketchucation.com/pluginstore?pln=Rotateplanview