Did you read the solution earlier in this thread? Saved render templates are causing the issue. Just use a stock render preset and modify it to your needs until the bug can be fixed.
I have installed VP17 and cannot even get it to start. It hangs up around "video plug in factory". I am running the latest beta version of Windows 10. VP16 works fine but does crash from time to time. So, if I can't get VP17 even to start, what hope? Tried in ordinary and administrator mode. I have also tried Windows 8 compatibility. And I have installed Nvidia Studio driver. None of these seem to help.
I ended up getting the same error with a custom NVENC template in build 321. Starting over from a stock Magix one solved the "a stream could not be read" problem.
I ran into this today problem with a self-created template (1920x1080, 24fps, NVENC), so the problem has not been resolved in Build 387. I had to recreate the template to make it work