Hello Samir,
It seems to me you have mapped a network drive for your workspace:
"N:\NWDS Install Files\workspace.jdi\"
If this is true, I would like to remind you that NWDS is using only local (from file-system perspective) workspace.
Next, would you please cross check whether this com.sap.security.core.securitypolicy.assertions package exists in your workspace (workspace.jdi\LocalDevelopment\t\9D46F866BA01AE3BBC7DC169104B9248\gen_wdp\packages\useradminmain). If yes, please post the full log to have a look on which DCs are using it.
Regards