Installed 6.o.24 with same results.
Failed to open a session for the virtual machine Kali 2020 x64 Customized by zSecurity v1.2.

The virtual machine ‘Kali 2020 x64 Customized by zSecurity v1.2’ has terminated unexpectedly during startup with exit code 1 (0x1). More details may be available in ‘C:\Users\teaml\VirtualBox VMs\Kali 2020 x64 Customized by zSecurity v1.2\Logs\VBoxHardening.log’.

Result Code: E_FAIL (0x80004005)
Component: MachineWrap
Interface: IMachine {5047460a-265d-4538-b23e-ddba5fb84976}

It does not seem like I will be able to complete this course!!(: