Unable to save changes or create new files to DevTest project

Document ID : KB000109821
Last Modified Date : 06/08/2018
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Issue:
I am unable to save changes or create a new files in a project.
I get the following error message:
"Unable to save changes to the default configuration for the project: $PROJECT_ROOT\Configs\project.config"
"The following file cannot be written to. If using a source control system, please make sure it has been checked out. 
$PROJECT_ROOT\VServices\Images\VSIName.vsi 
 
Environment:
All supported DevTest releases.
Resolution:
This type of errors happens when the system user starting the Workstation, does not have permissions to modify the files in the project folder.
One of the two items below will help to resolve this issue:
. Give permissions to the system user to modify the PROJECT_ROOT directory.
. Create the PROJECT_ROOT directory where the system user has read and write permissions.