This issue is resolved. Between September 27 and 19:36 UTC today, some Google Business Profile posts with images failed to publish. Posts that failed can now be published again; no other action is needed on your side.

A fix is live and Google Business Profile image posts are recovering. We are monitoring to confirm everything is back to normal. If a post failed earlier, you can publish it again.

Since September 27, some Google Business Profile posts with images may fail to publish with an error. We have found the cause, an issue on our side when processing certain image formats for Google Business, and are working on a fix. Uploading the image as a JPG or PNG file avoids the problem. Next update within 60 minutes.