I have been trying to run the Shopify app available here https://github.com/Shopify/shopify-marketplaces-admin-app but it’s showing unusual behavior.
When you run it locally: if you start it like my-app-url.com/login?shop=my-store.com it works and lands you on the page where you can install the app. But if you try to install the app directly from apps → select store → development store then, you get “There’s no page at this address” error. So, I can’t install it on a store after deployment either.
I tried to find the problem and checked out one similar issue https://github.com/Shopify/shopify-app-template-node/issues/932. The behavior that I have is also similar but I can’t access it from apps while in deployment mode.