Gallery Plugin active, but .jpg not recognized as media

Steps to reproduce

  1. owncloud version 9.1.3
  2. Gallery 15.0.0

Expected behaviour
.jpg-pictures should be visible in “Gallery”

Actual behaviour
No mediadata found

Server configuration
Operating system: ubuntu 16.04LTS
Web server: Apache/2.4.18 (Ubuntu)
Database: mysql-server 5.7.16-0ubuntu0.16.04.1
PHP version: 7.0.8-0ubuntu0.16.04.3
ownCloud version (see ownCloud admin page): 9.1.3
Updated from an older ownCloud or fresh install: updated
Special configuration (external storage, external authentication, reverse proxy, server-side-encryption): no
occ app:list
Enabled:

  • activity: 2.3.2
  • calendar: 1.4.1
  • comments: 0.3.0
  • contacts: 1.5.1
  • dav: 0.2.7
  • federatedfilesharing: 0.3.0
  • federation: 0.1.0
  • files: 1.5.1
  • files_pdfviewer: 0.8.1
  • files_sharing: 0.10.0
  • files_texteditor: 2.1
  • files_trashbin: 0.9.0
  • files_versions: 1.3.0
  • files_videoplayer: 0.9.8
  • firstrunwizard: 1.1
  • gallery: 15.0.0
  • notifications: 0.3.0
  • provisioning_api: 0.5.0
  • systemtags: 0.3.0
  • templateeditor: 0.1
  • updatenotification: 0.2.1
    Disabled:
  • encryption
  • external
  • files_antivirus
  • files_external
  • user_external
  • user_ldap

ownCloud log (data/owncloud.log)

Please paste possible errors in the following code block, see How to find webserver or OC logfile / enable php logfile for more info

Integrity status for oC9+
Login as admin user into your ownCloud and access
http://example.com/index.php/settings/integrity/failed
paste the results here. No errors have been found.