I can't connect to my Snack: upstream connect error or disconnect/reset before headers. retried and the latest reset reason: connection termination

Hi all
After I tried uploading a 36M json file, my Snack crashed and now I can no longer modify my project.
I get this:
upstream connect error or disconnect/reset before headers. retried and the latest reset reason: connection termination

Is there any way I can at least get to download my work on Snack, outside the web interface. I would lose some of the work I was prototyping in Snack