In Pastel, if you don't specify HTTP vs HTTPS when creating a canvas, we default to HTTPS. You are able to specify HTTP when creating a canvas by entering the full URL.
In the case you did not specify, you are able to either create a new canvas for your website by specifying HTTP or alternatively, we can update the existing canvas on our end to be HTTP instead of HTTPS.
If you'd like us to update your existing canvas from HTTPS to HTTP, please contact us on our chat at the bottom right of the page or by email at hello@usepastel.com.