When saving items, most people typically use the search button to navigate to their folder. However, when dealing with a network drive, you might opt to select a network shortcut, such as X:\ or any other assigned letter. This shortcut is only accessible when a user is logged in because it is user-specific. This means that once you log off from Windows, the shortcut becomes unavailable, causing the save action to fail.
To circumvent this, use the actual network path instead of the shortcut. Edit the save action and navigate to your folder using the network neighborhood, not the shortcut.
The final path should resemble this: \\MyNetWorkDrive\MyFolder\
