Critical error while starting VM

[GingerChoc]

I installed VirtualBox 7.0.12 on my Windows 11 computer. When I started a VM with Ubuntu, I got an error message that a critical error had occurred and the machine excecution was stopped:

A critical error has occurred while running the virtual machine and the machine execution has been stopped.
For help, please see the Community section on ... or your support contract. Please provide the contents of the log file VBox.log and the image file VBox.png, which you can find in the C:\Users\picas\VirtualBox VMs\Ubuntu\Logs directory, as well as a description of what you were doing when this error happened. Note that you can also access the above files by selecting Show Log from the Machine menu of the main VirtualBox window.
Press OK if you want to power off the machine or press Ignore if you want to leave it as is for debugging. Please note that debugging requires special knowledge and tools, so it is recommended to press OK now.

Unfortunately, the log files are too large for the attachments and I can't find the VBox.png image. How can I deal with that problem?
Many thanks in advance!

[scottgus1]

The log should fit when zipped.