My subscriptions list page (/a/subscriptions) shows as a blank page. How do I resolve this?

It could be that you changed the proxy URL for our Seal Subscriptions app in your shop, which means that this link doesn't work in your shop anymore.
We recommend that you go to Shopify admin > Settings > Apps and sales channels > Seal Subscriptions > App proxy and make sure that the “proxy URL” is set to: “/a/subscriptions”