Failed to open release log (could not open file ‘/home/user/VirtualBox VMs/sol/Logs/VBox.log’ (fOpen=0x322), VERR_FILE_NOT_FOUND).

Failed
to open release log (could not open file ‘/home/user/VirtualBox VMs/sol/Logs/VBox.log’
(fOpen=0x322), VERR_FILE_NOT_FOUND).

To fix the problem:

root@user:/home/user# cp .VirtualBox/VirtualBox.xml-prev .VirtualBox/VirtualBox.xml