Webwork needs to be set to a location that is shared to each grid node when using grid launched workspace servers.
Just FYI, here is some more information on webwork.
It is the default library when using Studio's interactive mode. In interactive mode, each program gets a workspace server session, and all of the workspace server sessions from your Studio session share the webwork. In a SAS grid when using grid launched workspace server sessions the workspace sessions can run on any of the grid nodes, therefore the directory used for webwork needs to be in a shared location accessible from each grid node.
See this blog entry for further information: http://blogs.sas.com/content/sgf/2016/09/21/sas-st udio-tips-for-sas-grid-manager-administrators-wher ...
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