Cannot delete files nor create folders

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.Have a user or admin login to the owncloud web application
2.create a folder or remove an existing file
3. you get a message the folder can not be created or the file is not removed.

Expected
Folder is created or file is removed.

Actual behaviour
none of the 2 happens.

Server configuration
Operating system:some linux (not sure which one hosting provider is running
Web server: some appache
Database:mysql
PHP version:not known
ownCloud version (see ownCloud admin page):ownCloud 9.1.0 (stable)
Updated from an older ownCloud or fresh install:fresh install
ownCloud log (data/owncloud.log, see https://central.owncloud.org/t/how-to-find-webserver-or-oc-logfile-enable-php-logfile/808):
when removing a file, adding folder I get this in the log. Not sure if this is related;
log entry;
disk_free_space() has been disabled for security reasons at /home/waltebv145/domains/allevissenop.be/public_html/Oc/lib/private/Files/Storage/Local.php#289

Special configuration (external storage, external authentication, reverse proxy, server-side-encryption):not known

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. :slight_smile:

Integrity checker has been disabled. Integrity cannot be verified.