I tried to search the Forum for this with no hits.
I am using Wavelab 8.5.10. Rendering a stereo file with the Sonic Enhance plugin in the Mastering section does run the rendering, but the resulting file doesn’t have the effect. It sounds the same as the original file.
I tried with a couple of other plugins, with them the rendering works as expected. A delay and an EQ worked fine.
Is there something I am not seeing?