Cannot get basic cron / cronjob to run (following the DO tutorial)

My droplet is running Ubuntu 14.04 and I am using ServerPilot to manage it (although I don’t think that matters for my question). I have followed the Digital Ocean tutorial for “how to use cron to automate tasks on a vps”, here: https://www.digitalocean.com/community/tutorials/how-to-use-cron-to-automate-tasks-on-a-vps

But I get nothing happening…no cronjob runs, no email sent. Can anyone help me with what to do next - to troubleshoot or what else to try? This is currently what is in my crontab (copied from the tutorial, just replaced the example email with my email):

SHELL=/bin/bash
HOME=/
MAILTO=”example@digitalocean.com”
#This is a comment
* * * * * echo ‘Run this command every minute’

EDIT: When I enter crontab with crontab -e the file location is listed as “/tmp/crontab.0aXfre/crontab”…could that location be the problem?