I found a way to extend the 30 minutes to an hour, but of course this is not the solution.
There is an ongoing problem with some spaces getting stuck forever during the build, but in your case the build is done and doesn’t seem to work after the start.
The strange thing is that it keeps running until the time expires instead of stopping with an error.
It could be someone else’s, but without the code I can’t tell any more. Even if there is, I don’t know much JavaScript… though I can read it. Well, if you’re tripping on HF-related issues rather than logic, there’s a chance I can figure something out too.