Can't run Docker in R

Hello.
I’m trying to open a container “vol2bird” in R.
The checkDocker() command is working and i’m getting the “Hello from Docker!” message, but when i’m trying to run the container, the message I get is:
“Error in vol2bird(file.in) : failed to start vol2bird Docker container
In addition: Warning message:
In startContainer(normalizePath(mount, winslash = “/”)) :
failed to mount C:/Users/user/Google Drive/PhD/Enram training course/practical adriaan/20150927 … Go to ‘Docker -> preferences -> File Sharing’ and add this directory (or its root directory) as a bind mounted directory”

How do I solve it? how do I go to the preferences?
Thanks
Inbal