using the COS blog posts API I could create blog posts till last week.
From then on we only got the HTTP code 403 with the error message CONTENT_SCOPE_RESTRICTED back.
I checked the access token and it has nearly all available scopes (including files and content).
What’s confusing is the endpoint is located at /content/api/v2/blog-posts but the error message mentions /blogs/v3/blog-posts as request url.
If I try /blogs/v3/blog-posts as endpoint I get another error message (PARENT_BLOG_DOES_NOT_EXIST)
The only thing changed was our blog domain. I tried a new domain for blog posts, but deleted that domain after some time.