More bug fixes.
There may be a regression, in this version, it's getting 404 on local files, trying to access for example JSON files from preview.construct.net/test.json instead of the local file.
I just tested this and it's working fine for me. As ever, if you run in to any problems please file an issue following all the guidelines.
Thanks for looking into it, I haven't found a way to reliable replicate it. Seems almost random at the moment. If I do, I'll file a proper bug report.