CSRF check failed after upgrade to 9.1

I have the same problem.

After yum update, it updated to latest version on CentOS 7. The database update went fine, but now I am unable to log in anymore, neither as a user or administrator.

How can I help to supply more information?

How can I disable the files_sharing?
I used sudo -u apache php occ app:disable files_sharing but it did not help.

Kind regards

EDIT:
List of enabled/disabled apps:

Enabled:

  • activity: 2.3.2
  • comments: 0.3.0
  • dav: 0.2.5
  • federatedfilesharing: 0.3.0
  • federation: 0.1.0
  • files: 1.5.1
  • files_pdfviewer: 0.8.1
  • 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
  • user_external: 0.4
    Disabled:
  • encryption
  • external
  • files_antivirus
  • files_external
  • files_sharing
  • user_ldap