Not working, crashing blender and traceback errors

[vovan-ivanoff]

I have ran into issue. I have 9 material 3 of them with alpha textures and this scheme

other 6 are just colors with different shader values(like smoothness, metalic, etc)
and after installing this plugin i`ve clicked generate material list then Save atlas to... button,

but materials disappeared no atlas created no save file dialogue is shown.

I have tried reinstalling plugins, reinstalling blender, running as admin, but nothing happens. if click checkbox here

blender gives traceback error

or just crashes without any error.

What could be problem?
Thanx:)

[Oriphen]

I'm also having the same issue. Identical Lines in python Etc.

[Bunie89]

Same issue here

[miyanorisako]

Same issue too.