I also had that specific error.
I found that if I removed the "unren-dev.rpyc"-file from the game folder it worked.
If I then wanted to enable the console I could still run unren myself, enable it and then remove the following line from the resulting "unren-dev.rpy"-file that is created in the game folder:
Something about that option makes it crash on startup in this game. The precompiled "unren-dev.rpyc"-file" must have it enabled. Strange it seems to work still for some people? I run the game on a Mac if it matters.