Title: S3 Service API: Validation errors
Last modified: August 21, 2016

---

# S3 Service API: Validation errors

 *  [Kathy Drewien](https://wordpress.org/support/users/kdrewien/)
 * (@kdrewien)
 * [12 years, 5 months ago](https://wordpress.org/support/topic/s3-service-api-validation-errors/)
 * Backups since Jan 1 have generated the following error on only one site.
    S3 
   Service API: Validation errors: [ContentType] must be of type string
 * This is the only client site which backs up to their S3 account instead of mine,
   so I’m not sure if the issue is within AWS3 or BackWPup.
 * A search within the support forum shows this error occurring approximately 10
   months ago with an earlier version. We are running 3.1.1 on WP 3.8.
 * Any clues for resolution?
 * Kathy
 * [http://wordpress.org/plugins/backwpup/](http://wordpress.org/plugins/backwpup/)

Viewing 2 replies - 1 through 2 (of 2 total)

 *  [shep](https://wordpress.org/support/users/shep/)
 * (@shep)
 * [12 years, 5 months ago](https://wordpress.org/support/topic/s3-service-api-validation-errors/#post-4490587)
 * I’m getting the same message on one site. Other sites are backing up fine (to
   the same s3 account).
 *  Plugin Contributor [Daniel Hüsken](https://wordpress.org/support/users/danielhuesken/)
 * (@danielhuesken)
 * [12 years, 5 months ago](https://wordpress.org/support/topic/s3-service-api-validation-errors/#post-4490626)
 * Hello, i have improved the Mime type detection of files. I hope that will solve
   this problem. it will come with the next bugfix release.

Viewing 2 replies - 1 through 2 (of 2 total)

The topic ‘S3 Service API: Validation errors’ is closed to new replies.

 * ![](https://ps.w.org/backwpup/assets/icon-256x256.png?rev=3236141)
 * [BackWPup – WordPress Backup & Restore Plugin](https://wordpress.org/plugins/backwpup/)
 * [Support Threads](https://wordpress.org/support/plugin/backwpup/)
 * [Active Topics](https://wordpress.org/support/plugin/backwpup/active/)
 * [Unresolved Topics](https://wordpress.org/support/plugin/backwpup/unresolved/)
 * [Reviews](https://wordpress.org/support/plugin/backwpup/reviews/)

 * 2 replies
 * 3 participants
 * Last reply from: [Daniel Hüsken](https://wordpress.org/support/users/danielhuesken/)
 * Last activity: [12 years, 5 months ago](https://wordpress.org/support/topic/s3-service-api-validation-errors/#post-4490626)
 * Status: not resolved