In the machine settings page system->acceleration hardware virtualization check box not responding.

[subhajit]

For a virtual machine settings, a invalid setting is indicating on the system -> acceleration page , suggested that the hardware acceleration should be off. After uncheck it the OK button is not enabled , not able to save the configurations.

[subhajit]

Screenshot of the context.

[fth0]

The error message is a remainder of an old checkbox that no longer exists in VirtualBox 6.1. It should be gone in the next VirtualBox release update and in the VirtualBox test builds 6.1.29r147956 and newer.