Hi Adrian,
Thanks for reaching out to us.
Could you please clarify whether you're using the standalone Helix Ultimate template or a template that's built on Helix Ultimate?
If it's a Helix Ultimate-based template, could you let me know the template name?
From my knowledge, Helix Ultimate itself doesn't include default module positions named heading1 or heading2. Those positions are usually defined by the template rather than the framework itself, so knowing which template you're using will help us understand where those positions are expected to come from.
Thanks