Custom Firmware Builder - Error - Removing AP_OPTICALFLOW_ENABLED

[Iuliu]

I am trying to enable optical flow for Matek f405HDTE in Custom Firmware Builder - https://custom.ardupilot.org/

The issue is that optical flow is automatically removed.
https://custom.ardupilot.org/builds/copter:MatekF405-TE:d2984cbd99fc1d8d21d7a297bd0ad80508980b6c:795a28f52a6ac29b145f09f5bf98bcd1/

[Iuliu]

I have tried to decrease other default features, but the issue persists.