You can't access this shared folder because your organization's security policies block unauthenticated guest access.

Problem:

Receiving error when launching StarShip.
Cannot switch company. Folder "\\10.0.0.4\msg-out\" is not accessible
Cannot create file "\\10.0.0.4\msg-in\ADEOUTT.1". You can't access this shared folder because your organization's security policies block unauthenticated guest access. These policies help protect your PC from unsafe or malicious devices on the network

Solution: Allow 'Insecure Guest Logons' in Group Policy Editor. 

1. Click 'Start', type gpedit.msc, and select Edit group policy.
2. In the left pane under Local Computer Policy, navigate to Computer Configuration\Administrative Templates\Network\Lanman Workstation.
3. Open Enable insecure guest logons, select Enabled, then select OK.