If you've run into post failures to your GBP account in Cloud Campaign, follow these steps to resolve issues with the location you're trying to publish to, or the content itself. Try reposting the failed post(s) after each step to check if the issue was resolved.
1. Relink the account
With Google, we always recommend a hard refresh on the account connection. Click the brand settings icon in the top left of your account, and find the Linked Accounts tab. Click "Add New", select Google Business Profile, and link the account having post failures as if it was a new account
2. Double check permissions for this location, and for possible duplicate locations
Follow the steps in this article to check your access level on the affected GBP location.
You'll also want to verify if there's a duplicate location for the affected GBP location, or if it needs to be verified. Having more than one GBP profile for the same business/location will prevent your posts from reaching the account. Go to business.google.com/locations to see the status of your GBP locations.
3. See if your post violates Google's content policies
Google has some extensive content policies that need to be followed, even when publishing from a 3rd party platform like Cloud Campaign. Review these policies, and ensure your posts don't violate any of them, as it would lead to Google blocking the post.