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Sorry to hear you’re facing problems 
help.nextcloud.com is for home/non-enterprise users. If you’re running a business, paid support can be accessed via portal.nextcloud.com where we can ensure your business keeps running smoothly.
In order to help you as quickly as possible, before clicking Create Topic please provide as much of the below as you can. Feel free to use a pastebin service for logs, otherwise either indent short log examples with four spaces:
example
Or for longer, use three backticks above and below the code snippet:
longer
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Some or all of the below information will be requested if it isn’t supplied; for fastest response please provide as much as you can 
Nextcloud version (eg, 12.0.2):
Operating system and version (eg, Ubuntu 17.04):
Apache or nginx version (eg, Apache 2.4.25):
PHP version (eg, 7.1):
The issue you are facing:
Is this the first time you’ve seen this error? (Y/N):
working on mac ios 10.14.1 Mojave
i have installed the nexcloud app, Version 2.3.3 (build 84)
connection with server is established, in activity tracking all events that i do online are displayed locally.
e.g. create calendar event.
the file sync with my local next cloud folder never works
file structure is copied, but documents missing.
the only documents i see are those that were online, when i created the server connection first time.
online i am using Firefox latest version.
also, there i am not allowed to move files that i am not owning.
also not in the browser online version.
only allowed to move files from one folder to another when i own the file, i.e. if i have created the file.
my user does own admin rights.
the user is sharing the folders and files described above.
Is there some one who can manage this problem for pay? like to give my laptop in the hands of a specialist in Berlin and have everything configured to good funcionality.
Wir können auch deutsch sprechen
The output of your Nextcloud log in Admin > Logging:
i dont know what to past here
The output of your config.php file in /path/to/nextcloud (make sure you remove any identifiable information!):
PASTE HERE
The output of your Apache/nginx/system log in /var/log/____:
PASTE HERE