Invalid reference format, help

Hey, I want to use Binder for a demo for one of my project. Everything was good but it suddenly returns this error when I opened it today:

Waiting for build to start…
Picked Git content provider.
Cloning into ‘/tmp/repo2dockerp4oovtki’…
HEAD is now at 307bb54 fix small bug
Using DockerBuildPack builder
Step 1/5 : FROM node:
invalid reference format

I tried to refresh but no good. Could you help me what I should do to fix it? Thanks!

Hi! Looking at your GitHub repo, you are using a Dockerfile to build the environment. This is considered advanced usage of Here are some resources:

Hey sgibson91,

Thanks! it is now good after deleting the dockerfile (it was accidentally added).

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