Error relaunching VirtualBox VM process:5
Command line: '81954AF5-4D2F-31EB-A142-B7AF187A1C41-SUPLIB-2NDCHILD
--comment "CS50 Appliance 19_1" --startvm
e1971bc0-0443-4b19-98a1-50e50083167e --no-startvm-errormsgbox'
(rc=-104)

Failed to open a session for the virtual machine CS50 Appliance 19_1
The virtual machine CS50 Appliance 19_1 has terminated unexpectedly during startup with exit code 1.

Details:

Result code: E-FAIL (0x80004005
Component: machine
Interface: IMachine {480cf695-2d8d-4256-9c7c-cce4184fa048}