Loudnorm causes rendering to fail on Voukoder Pro

Simply adding the audio filter causes immediate failure of Voukoder Pro to render. Vegas stops instantly with a "unable to start Voukoder Pro" error on render. Removing the filter restores normal operation. This is on all default settings.

First capture is without LOUDNORM, works perfectly. Although weirdly, when batch rendering regions in Vegas, it's losing about 20% speed each regions as it progresses through them .... e.g. 80fps, then 64fps, then 50fps, then 35fps, then 20fps, etc until it slows to a crawl. There's no visible memory leak detectable in Task Manager for either CPU or GPU.

voukoder1.txt

Second capture is with LOUDNORM, same profile, just inserted in between audio IN and render OUT. This immediately fails, and the rejected bitrate message is curious because the same bitrate works perfectly in the above profile without LOUDNESS. It also works as expected when used in ffmpeg from command line : -af loudnorm=I=-24:LRA=11:TP=-2

voukoder2.txt

And for whatever it's worth, these are the scene files from Vegas 22, I couldn't find Voukoder's storage location for its profiles.

voukoder pro.zip

Thank You!