When rendering video project, some plug ins flashing then turning off totally in final render-ie:background generator, auto pan and probably more. tried video card accelaration off and on, different computers to no avail. newest ver 20. So can't use quite a lot of plug ins for editing-4k or 1080p. tried many different res for render-no difference.
You chose Video Pro X as your product but in your post you say you have newest ver 20 which makes me wonder whether you actually have Vegas Pro 20. The plugins you mention also suggest this might be the case!
If so, please read this pinned post and follow the advice given there.
If not, please post back with full details of your computer (hardware and software) and , ideally, a MediaInfo analysis of your source video files.