A specified logon session does not exist. It may already have been terminated.
Figure 1

This message appears when using not "Server\Username" but "Username" as credential in order to map the network drive after booting from SRD that is created with ADK 10 version 2004 or Windows 10 version 2004.
Perform either 1 or 2.
1. Use ".\Username", "Server\Username" or "Domain\Username" as a credential. (See Figure 2)
Figure 2

2. Use "net use" after opening a command prompt from "Analyze" -> "Open Command Shell Window". (See Figure 3 and Figure 4)
For instance:
net use z: \\192.168.1.1\share /user:administrator
or
net use z: \\192.168.1.1\share /user:.\administrator
Figure 3

Figure 4
