To access Sandbox mode, you need to be on a Pro or Enterprise Plan. [1]
If you're on the right plan, enable it by clicking Live in the top left → Sandbox mode. Alternatively, you can click Actions → Turn on sandbox mode. [2]
If you still can't access it and you're on a Pro or Enterprise plan, please request human assistance by clicking "Talk to a person" for further help.
If you still need help accessing Sandbox mode, I’m here to assist you. Would you like to provide more details about the issue you’re experiencing so we can continue troubleshooting?