Please help us by providing the following info.
Steps to reproduce
1. Select one or more files to upload to ownCloud server.
2. Upload to any or default directory in ownCloud server.
3. All files in "Uploads" are in "Waiting server connection" (translated from spanish release). Sometimes progress bar and "Waiting for upload" (translated from spanish release) appear but nothing is uploaded.
All files queued should be uploaded to server.
All files queued don't upload to server.
Mobile client configuration
Client OS (iOS, Android, ...): iOS 8.4, iOS 9.3.4, iOS 9.3.5
Client version: 3.5.0
Operating system: CentOS 7.1
Web server: Apache 2.4.6
Database: MySQL 5.6.10
PHP version: PHP 5.4.16
ownCloud version (see ownCloud admin page): 8.1.3
Updated from an older ownCloud or fresh install: Fresh install.
ownCloud log (data/owncloud.log): Excerpt from server log:
188.8.131.52 - user [26/Aug/2016:13:09:47 +0200] "PUT /remote.php/webdav/filexxx HTTP/1.1" 400 223 "-" "Mozilla/5.0 (iOS) ownCloud-iOS/3.5.0"
Special configurations (external storage, external authentication, reverse proxy, server-side-encryption): NFS, F5 balancer encryption.