NOT Working with version xd 40.1.22.3

when i try to load plugin to the newest version of xd (using the uxp developer tool) i get this error:

for some reason it works for me just when do it on the previous version (39.9.11.10) - what am i missing?

The plugin itself must not be in the Plugins or Develop folder. Move the plugin to another location your disk and try again. (This will also help you preserve your plugins against any bugs that might wipe out your plugins/develop folder – I’ve had that happen a few times, and it isn’t fun losing your code that way.)