Face extraction render pass problem


I’m not able to use the Face Extraction Render Pass patch in any project, the generated texture is empty.

I can’t share my project package as I’m a new user, but I’m using the same setup as the example on this page in an empty project:

I also tried Josh’s package sent in this thread here:
And my face doesn’t turn blue.

Has anyone had a similar problem? Maybe it’s a setting I didn’t activate, but I couldn’t find anything relevant.

I’m using Spark version 177, but I’ve also tried it on versions 171-176.