Ooops something went wrong... as we were trying to run the Auto Color 2.0 script

Hi all, I have a problem, when I want to convert a negative an error window pops up in the middle of it. It says something like:

Ooops something went wrong… as we were trying to run the Auto Color 2.0 script…
Error message: the command win\convert.exe is written wrong or can’t be found…

I have Lightroom 6.3 and NLP trial at the moment.