That's odd, nothing changed in the code to break it on the next update. What are the specs of that machine by the way.
At this point I only see two reasons for this to be an issue:
1. The code compiler is taking longer to finish compiling code than everyone else, and in doing so locks a file for some reason in a way that no one else is experiencing.
2. There's some security program that is affecting the compiler and the files it uses after it runs the first time, so the second time it's invoked, it has some locks.
I've seen the 2nd one happen myself with normal developing in VS with malwarebytes, but not this specific file being locked.
Can you once again be sure your AV programs are disabled, Windows defender is disabled (will need to reboot pc), and try running it again? I can try to think of some roundabout ways to try and address this for you, but I can't do anything major that will affect everyone else since so far this is the only consistent report I have on the issue, and most times issues like these are related to something on the machine (usually unknown to the user) affecting EB.






