We have confirmed the phone number for the API, but I get the following error when getting the access token
Unsupported post request. Object with ID '455168744337481' does not exist, cannot be loaded due to missing permissions, or does not support this operation. Please read the Graph API documentation at https://developers.facebook.com/docs/graph-api

I press the "Create template" and then setting the type of template ("Utility"), then after I press next it takes me back to my dashboard of templates.
If I ty to edit a template from the library it goes pretty much the same. Whenever I lclick on a template and click "Edit" it takes me back to the dashboard.
Also, when I'm in the dashboard after clicking on a button it does several autoamtic reloads of the page to finally display the page. In fact, I've been blocked by facebook from accessing my dashboard because "I was doing things too fast" even though it was facebook who did the reloads automatically and spammed itself basically.
All in all, my experience with the WhatsApp API is horendous, but unfortunately I need it, so any help would be much appreciated.

I have created a catalog and connected it using this document but I want to do it with API now. I know how upload products using feed API but I cannot find any API endpoint to connect the catalog to a particular WABA account. Is there something that I am missing here?

I can't create a new template because the page always reloads and returns to the home page

While editing a message template whatsapp manager, the page wouldn't open. It loaded for a while and then refreshed itself continously. I waited to see if the edit page would appear, but instead, I received a temporary ban stating that I had misused the feature. I understand the ban condition, but it wasn't my fault—the page kept reloading and triggering the request.