You will need your system administrator to resolve this issue.
Turn off UAC or use the Administrator account for testing.
Check that the mapped network drive is available.
Right-click command prompt and choose Run as Administrator.
Type net use.
Enter (shows the list and status of all mapped network drives).
To delete unavailable drive, type net use /delete <drive letter>:
Manually add the mapped network drive by using the net use command. Ensure you enter a space after the drive, for example: Drive:<space here>\\...
Right-click command prompt and choose Run as Administrator.
Option1: net use Z: \\<servername>\Apps
Option2: net use Z: \\<servername>\Apps /user:<admin user> /persistent:yes