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Sorry to hear you’re facing problems 
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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, 20.0.5): 24.0.5
Operating system and version (eg, Ubuntu 20.04): CentOS 8
Apache or nginx version (eg, Apache 2.4.25): Apache/2.4.37
PHP version (eg, 7.4): PHP 7.4.30
The issue you are facing: I cannot figure out how to install calendar, contacts, notes, anything in groupware. When I look up the guide on how to install it, it shows icons/buttons that do not exist in my nextcloud installation. I have attached a picture.
Is this the first time you’ve seen this error? (Y/N): Y
Steps to replicate it:
- Go to apps and see that the guide online has buttons for installing stuff mine doesn’t.
- be sad
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!):
<?php
$CONFIG = array (
'instanceid' => 'notonapublicforum',
'passwordsalt' => 'notonapublicforum',
'secret' => 'notonapublicforum',
'trusted_domains' =>
array (
0 => '127.0.0.1',
1 => 'not giving on a public forum',
2 => 'noooo',
),
'datadirectory' => '/var/www/html/nextcloud/data',
'dbtype' => 'mysql',
'version' => '24.0.5.1',
'overwrite.cli.url' => 'http://127.0.0.1/nextcloud',
'dbname' => 'nextcloud_db',
'dbhost' => 'localhost',
'dbport' => '',
'dbtableprefix' => 'oc_',
'mysql.utf8mb4' => true,
'dbuser' => 'nextcloud_user',PASTE HERE
'dbpassword' => 'lolnotgivingthatonapublicforum',
'installed' => true,
);
The output of your Apache/nginx/system log in /var/log/____:
[Fri Sep 09 01:27:06.877911 2022] [lbmethod_heartbeat:notice] [pid 2191:tid 140405515745600] AH02282: No slotmem from mod_heartmonitor
[Fri Sep 09 01:27:06.886333 2022] [mpm_event:notice] [pid 2191:tid 140405515745600] AH00489: Apache/2.4.37 (centos) OpenSSL/1.1.1k mod_fcgid/2.3.9 configured -- resuming normal operations
[Fri Sep 09 01:27:06.886370 2022] [core:notice] [pid 2191:tid 140405515745600] AH00094: Command line: '/usr/sbin/httpd -D FOREGROUND'
[Fri Sep 09 01:29:07.123905 2022] [mpm_event:notice] [pid 2191:tid 140405515745600] AH00493: SIGUSR1 received. Doing graceful restart
[Fri Sep 09 01:29:07.215263 2022] [lbmethod_heartbeat:notice] [pid 2191:tid 140405515745600] AH02282: No slotmem from mod_heartmonitor
[Fri Sep 09 01:29:07.217724 2022] [mpm_event:notice] [pid 2191:tid 140405515745600] AH00489: Apache/2.4.37 (centos) OpenSSL/1.1.1k mod_fcgid/2.3.9 configured -- resuming normal operations
[Fri Sep 09 01:29:07.217744 2022] [core:notice] [pid 2191:tid 140405515745600] AH00094: Command line: '/usr/sbin/httpd -D FOREGROUND'
[Fri Sep 09 01:34:40.507146 2022] [access_compat:error] [pid 4905:tid 140404843239168] [client 192.168.1.144:58011] AH01797: client denied by server configuration: /var/www/html/nextcloud/data/.ocdata
[Fri Sep 09 01:38:41.921809 2022] [mpm_event:notice] [pid 2191:tid 140405515745600] AH00493: SIGUSR1 received. Doing graceful restart
[Fri Sep 09 01:38:42.037811 2022] [lbmethod_heartbeat:notice] [pid 2191:tid 140405515745600] AH02282: No slotmem from mod_heartmonitor
[Fri Sep 09 01:38:42.041604 2022] [mpm_event:notice] [pid 2191:tid 140405515745600] AH00489: Apache/2.4.37 (centos) OpenSSL/1.1.1k mod_fcgid/2.3.9 configured -- resuming normal operations
[Fri Sep 09 01:38:42.041642 2022] [core:notice] [pid 2191:tid 140405515745600] AH00094: Command line: '/usr/sbin/httpd -D FOREGROUND'
[Fri Sep 09 01:39:14.137146 2022] [access_compat:error] [pid 5504:tid 140403646899968] [client 192.168.1.144:60494] AH01797: client denied by server configuration: /var/www/html/nextcloud/data/.ocdata
[Fri Sep 09 01:52:13.310027 2022] [access_compat:error] [pid 5728:tid 140403797903104] [client 127.0.0.1:59630] AH01797: client denied by server configuration: /var/www/html/nextcloud
PASTE HERE
Output errors in nextcloud.log in /var/www/ or as admin user in top right menu, filtering for errors. Use a pastebin service if necessary.
PASTE HERE