It still fails with all of my extensions disabled (wipr, privacy redirect). I just get a download dialog. I don't know what the HTTP status code is, however.

I found a flagged HN submission about it and it has just about the same result for me and for others. My first tap failed in a weird way (showed some text then redirected quickly to its git repo) and all subsequent taps trigger a download.

https://news.ycombinator.com/item?id=44538010