Based on the version number Redshift 2.6.41, this corresponds to a release from early 2019. This version is historically significant as it was one of the last major stable releases before Redshift switched to version 3.0.
REDSHIFT_NO_AVX=1 to your Windows System Environment Variables.Houdini Version: Ensure your Houdini version matches what Redshift 2.6.41 supports (typically Houdini 18.0.x or earlier). You can check your currently installed Houdini version through the Houdini Launcher. redshift renderer 2641 plugin for houdini win verified