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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): Nextcloud Hub 3 (25.0.1)
Operating system and version (eg, Ubuntu 20.04): Ubuntu 20.04
Apache or nginx version (eg, Apache 2.4.25): Apache/2.4.41 (Ubuntu)
PHP version (eg, 7.4): 7.4.3
The issue you are facing:
Overview mentions cron configuration as seen below. I have appended some config to config.php as stated in instructions but still shows. I believe the folder is owned correctly. Thanks
Is this the first time you’ve seen this error? (Y/N): N it has been there since beginning
The output of your Nextcloud log in Admin > Logging:
A lot of Identifiable information here?
The output of your config.php file in /path/to/nextcloud (make sure you remove any identifiable information!):
<?php
$CONFIG = array (
'instanceid' => 'xxxxxxxxxx',
'passwordsalt' => 'xxxxxxxxxx',
'secret' => '',
'trusted_domains' =>
array (
0 => 'xxxxxxxxxx',
),
'datadirectory' => '/var/www/nextcloudxxxxxxxxx/data',
'dbtype' => 'mysql',
'version' => '25.0.1.1',
'overwrite.cli.url' => 'https://xxxxxxxxxx',
'dbname' => 'nextcloud',
'dbhost' => 'localhost',
'dbport' => '',
'dbtableprefix' => 'oc_',
'mysql.utf8mb4' => true,
'dbuser' => 'xxxxxxxxxx',
'dbpassword' => 'xxxxxxxxxx',
'installed' => true,
'memcache.local' => '\\OC\\Memcache\\APCu',
'default_phone_region' => 'UK',
'mail_smtpmode' => 'smtp',
'mail_sendmailmode' => 'smtp',
'mail_from_address' => 'xxxxxxxxxx',
'mail_domain' => 'xxxxxxxxxx',
'mail_smtpauthtype' => 'LOGIN',
'mail_smtpauth' => 1,
'app_install_overwrite' =>
array (
0 => 'files_external_sia',
1 => 'backup',
2 => 'breezedark',
),
'twofactor_enforced' => 'true',
'twofactor_enforced_groups' =>
array (
0 => 'xxxxxxxxxx',
1 => 'xxxxxxxxxx',
),
'twofactor_enforced_excluded_groups' =>
array (
),
'maintenance_window_start' => 1,
);
The output of your Apache/nginx/system log in /var/log/____:
PASTE HERE
You can either add it by running the following command as root: