Did you solve your problem?
Are you talking about Eeschema?
When exactly does the error message appear?
What happens when you answer "No" to "Do you want to use a relative path"? Is it the same error message?
What is the absolute path of the "../user/share/kicad/library" directory? Did you create it?
If you created the directory, please you run this command then retry:
chmod -R 777 ../user/share/kicad/library