Internal data stream error in render

hi all,
I bought vegas pro 18 suite. it came with both boris fx continuum, and the stand alone boris particle effects.
I ahve a PC running windows 10 x64. But the only way I can get anything in the stand-alones of continuum is to change the render settings to .MOV and the apple prores encoder. that is the ONLY one that works. I do not like expoerting to these settings. How can i get the MP4 to work?
I read on one post that they said install klite codec. I did, and it still didnt work. has anyone else run into this?

yes me too. No solution yet