Google Merchant Center is currently experiencing API issues that are causing a temporary delay in product submissions.

A notice was posted in the Merchant Center portal and on Google’s status page.
According to the update, “Google is currently experiencing an API issue that is pausing updates to your Merchant Center. Our team is actively working to resolve this as soon as possible. Submissions will resume automatically once the issue is resolved. We sincerely apologize for this inconvenience and appreciate your patience.” Forum discussions are ongoing as many users report similar issues with their product feeds.
This update was shared by Bia Camargo and Barry Schwartz.