Please help us by providing the following info. Before posting please also check the pinned "Known issues" threads and make sure that you're running the latest available version for your oC release: https://owncloud.org/changelog/
Steps to reproduce
1. None, because i don't know wat to do... Thats why I ask you!
2.
3.
Expected behaviour
Change name of folder or document or delete if i want
Actual behaviour
Error message that it is not possible
Server configuration
Operating system: Dont't know, it is hosted (but I think Debian)
Web server: Apache
Database: mySQL
PHP version: Don't know
ownCloud version (see ownCloud admin page): 9.1
Updated from an older ownCloud or fresh install: Fresh
ownCloud log (data/owncloud.log, see https://central.owncloud.org/t/how-to-find-webserver-or-oc-logfile-enable-php-logfile/808):
Warning core Trusted domain error. "77.250.150.14" tried to access using "praktijkobi.nl" as host. 2016-09-08T19:12:46+00:00
Warning core Trusted domain error. "77.250.150.14" tried to access using "praktijkobi.nl" as host. 2016-09-08T19:12:45+00:00
Warning core Trusted domain error. "77.250.150.14" tried to access using "praktijkobi.nl" as host. 2016-09-08T19:12:45+00:00
Error PHP Invalid argument supplied for foreach() at /home/praktzi183/domains/praktijkobi.nl/public_html/team/core/templates/login.php#23 2016-09-08T14:42:43+00:00
Error PHP Undefined offset: 1 at /home/praktzi183/domains/praktijkobi.nl/public_html/team/core/Controller/LoginController.php#117 2016-09-08T14:42:43+00:00
Warning core Login failed: 'Dietist' (Remote IP: '178.225.189.59') 2016-09-08T14:42:42+00:00
Error PHP Invalid argument supplied for foreach() at /home/praktzi183/domains/praktijkobi.nl/public_html/team/core/templates/login.php#23 2016-09-08T14:41:49+00:00
Error PHP Undefined offset: 1 at /home/praktzi183/domains/praktijkobi.nl/public_html/team/core/Controller/LoginController.php#117 2016-09-08T14:41:49+00:00
Warning core Login failed: 'Dietist' (Remote IP: '178.225.189.59') 2016-09-08T14:41:48+00:00
Warning core Trusted domain error. "77.250.150.14" tried to access using "praktijkobi.nl" as host. 2016-09-08T13:39:04+00:00
Warning core Trusted domain error. "77.250.150.14" tried to access using "praktijkobi.nl" as host. 2016-09-08T13:39:03+00:00
Warning core Trusted domain error. "77.250.150.14" tried to access using "praktijkobi.nl" as host. 2016-09-08T13:39:03+00:00
Error PHP Invalid argument supplied for foreach() at /home/praktzi183/domains/praktijkobi.nl/public_html/team/core/templates/login.php#23 2016-09-08T13:03:14+00:00
Special configuration (external storage, external authentication, reverse proxy, server-side-encryption):
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.