I’m so sorry…
The reason for this problem is that I used the Varjo XR-3 headset without selecting the ‘stereo view’ rendering mode.
This information is described at the following URL:
I missed the description of ‘Setting up Stereo view’ and ‘Setting up Quad view’.
It is recommended to select the ‘stereo view’ rendering mode in order to use ‘Lumen’.
Thank you for your help.