Has anyone been able to run ErlPort on OTP 21

I’ve been using this fork https://github.com/walkr/erlport/commits/master rather successfully. And to use Python3 I had to roughly do what’s described here: https://github.com/hdima/erlport/issues/42 but I ran into some issues Getting :emfile even thou ulimit is set and ERL_MAX_PORTS set to 65536