Sailfish SDK Can't Get VirtualBox To work

What does command "vboxmanage list vms" say?

What version of Virtualbox are you using?

Related;

https://together.jolla.com/question/101886/solved-no-virtual-machine-with-the-name-mersdk-found-check-your-installation/

What does command "vboxmanage list vms" say?:

"exTern OS" {c2f5023a-88a9-444f-8808-5cb746c79e5f}

"Kubuntu" {e2c263b1-d39b-4f92-ae5b-a379a55f10bb}

What version of Virtualbox are you using?:

Oracle VM VirtualBox Manager 5.2.34_Ubuntu

So it's clear that neither the build engine or emulator vms are not there.

Could you paste the output of command 'grep -m 1 -A 10 "Build Engine" ~/SailfishOS/InstallationLog.txt" - it might give us some hint on what has went wrong?

Thanks for the reply, I did install sailfish to /opt/SailfishOS instead of ~/SailfishOS, could that be an issue?

Output of grep -m 1 -A 10 "Build Engine" /opt/SailfishOS/InstallationLog.txt

[162997] - arguments: /usr/bin/VBoxManage, createvm, --name, Sailfish OS Build Engine, --register, --basefolder, /opt/SailfishOS/mersdk, UNDOEXECUTE, /usr/bin/VBoxManage, unregistervm, --delete, Sailfish OS Build Engine, errormessage=Please shutdown the "Sailfish OS Build Engine" VM

[162997] Done

[162998] perform org.merproject.mersdk operation: Execute

[162998] - arguments: /usr/bin/VBoxManage, createvm, --name, Sailfish OS Build Engine, --register, --basefolder, /opt/SailfishOS/mersdk, UNDOEXECUTE, /usr/bin/VBoxManage, unregistervm, --delete, Sailfish OS Build Engine, errormessage=Please shutdown the "Sailfish OS Build Engine" VM

[162998] /usr/bin/VBoxManage" started, arguments: "createvm --name Sailfish OS Build Engine --register --basefolder /opt/SailfishOS/mersdk

[163098] Done

[163098] backup org.merproject.mersdk operation: Execute

[163098] - arguments: /usr/bin/VBoxManage, modifyvm, Sailfish OS Build Engine, --description, ATTENTION: This virtual machine is managed by the Sailfish SDK. Do not try to alter it!

[163098] Done

[163098] perform org.merproject.mersdk operation: Execute

[163098] - arguments: /usr/bin/VBoxManage, modifyvm, Sailfish OS Build Engine, --description, ATTENTION: This virtual machine is managed by the Sailfish SDK. Do not try to alter it!