Hey there @Bert
Welcome to the Forums! Sorry to hear you are encountering an obstacle.
Looking at your deploy log it looks like you’re using an outdated version of node.js. This is what I have copied from your deploy log:
4:23:13 PM: Downloading and installing node v8.17.0...
4:23:13 PM: Downloading https://nodejs.org/dist/v8.17.0/node-v8.17.0-linux-x64.tar.xz...
4:23:13 PM: Computing checksum with sha256sum
4:23:13 PM: Checksums matched!
4:23:16 PM: Now using node v8.17.0 (npm v6.13.4)
Can you try updating that and see if it solves this issue? You can read more about that here: