I think I found a bug in Vorple

I’ve started trying to get Vorple working inside a React project. It’s intermittently throwing this error in the console:

haven.js:218 Uncaught TypeError: cb is not a function
    at haven.js:218

vorple.js:305 Uncaught (in promise) TypeError: cb is not a function
    at _callee$ (vorple.js:305)
    at tryCatch (runtime.js:63)
    at Generator.invoke [as _invoke] (runtime.js:293)
    at Generator.next (runtime.js:118)
    at asyncGeneratorStep (vorple.js:37)
    at _next (vorple.js:39)

I think maybe it’s having an issue with the frontend server set up by create-react-app because the only time it happens is when I save in my editor and the server does a live refresh. So far, I haven’t been able to get it to occur when I manually refresh the browser. Other than that, there doesn’t seem to be any correlation between the error and anything that I’m doing.