Support intro
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
example
here
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): 16.0.5
Operating system and version (eg, Ubuntu 17.04):centos7.5
Apache or nginx version (eg, Apache 2.4.25): 2.4.27
PHP version (eg, 7.1): 7.2
The issue you are facing:
When we use ocs api to create share for a file in group folder, the Manager.php under lib/private/Share20 will throw exception in Line 325. The problem is caused by $permissions is not defined. So I add this cmd to solve it. But I am not sure is it Ok.
if (!isset($permissions)) $permissions=\OCP\Constants::PERMISSION_READ;
Is this the first time you’ve seen this error? (Y/N):Y
Steps to replicate it:
The output of your Nextcloud log in Admin > Logging:
PASTE HERE
The output of your config.php file in /path/to/nextcloud (make sure you remove any identifiable information!):
PASTE HERE
in the nextcloud log slide
problem found in create share of group folder files via OCS share api
The output of your Apache/nginx/system log in `/var/log/____`:
no problem found at there
