Cant activate trial

I have installed nuitrack onto ubuntu yet whenever I input my license it says:
Activation error: NuitrackException: /usr/etc/nuitrack/data/license.json: cannot open file
I have looked in that directory and the file: license.json doesnt exist but i havent deleted it
Any Ideas i just want to test skeleton tracking

Hi @johnnypipey!
It could be the permissions problem, try running this command:

sudo chown -R $USER:$USER /usr/etc/nuitrack