Hi @timfish,
That step is not maintained by us - are you sure that the Node version is actually the one you want? Can you please add this line to your script, right before you’d call html-minifier:
node --version
Note: our current recommended way of handling installing the right Node version is: How can I downgrade NodeJS? / How to install a specific NodeJS version?
You can download older images from Docker and run it locally on your Mac/PC (related guide: Running your build locally in Docker - Bitrise Docs )