X-Frame error SAMEORIGIN

Server
,
2

As you have also posted Server 9.0.9 only error! the root cause is most likely the same:

  1. Your webserver is not using .htaccess files at all
  2. You don’t have the needed headers module enabled

As both messages are nothing ownCloud specific and the configuration heavily depends on your used webserver (ownCloud just gives you generic hints about possible webserver configuration hardening) its highly recommended that you’re asking for more support in a forums dedicated to your used webserver.