Mounts denied. Can't configure shared paths from docker (on linux)

I am using a docker run command on terminal on linux and encountered this error:

Error response from daemon: Mounts denied:
the path /laserplasma/petros is not shared from the host and is not known to docker
You can configure shared paths from Docker → preferences → resources → file sharing

To fix the issue, I tried going to docker → resources → file sharing then entered the path /laserplasma/petros . However, Docker has been doing this for almost 30 minutes (running with the blue circle going around but not responding):

Evening wgn-

Were you able to resolve your issue? I had an odd bug with the loading wheel, I reinstalled and it corrected my issue.