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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 version 3.4.2-1ubuntu1
Using Qt 5.15.3, built against Qt 5.15.2
Using Qt platform plugin 'xcb'
Using 'OpenSSL 3.0.2 15 Mar 2022'
Running on Ubuntu 22.04.2 LTS, x86_64
Apache or nginx version (eg, Apache 2.4.25): Server version: Apache/2.4.52 (Ubuntu) Server built: 2023-03-08T17:32:01
PHP version (eg, 7.4): PHP 8.2.4 (cli) (built: Mar 16 2023 14:34:48) (NTS)
The issue you are facing:
Everything was working without issue up until a very-delayed system update with sudo apt update/upgrade -y
Is this the first time you’ve seen this error? (Y/N): yes
Steps to replicate it:
- Have a perfectly running nextcloud
- Make a blind update
- When trying to access it through the usual https://localhost/index.php/
- Get the following message
Not Found
The requested URL was not found on this server.
Apache/2.4.52 (Ubuntu) Server at localhost Port 80
The output of your Nextcloud log in Admin > Logging:
I`m not able to access it.
The output of your config.php file in /path/to/nextcloud (make sure you remove any identifiable information!):
<?php
$CONFIG = array (
'apps_paths' =>
array (
0 =>
array (
'path' => '/snap/nextcloud/current/htdocs/apps',
'url' => '/apps',
'writable' => false,
),
1 =>
array (
'path' => '/var/snap/nextcloud/current/nextcloud/extra-apps',
'url' => '/extra-apps',
'writable' => true,
),
),
'supportedDatabases' =>
array (
0 => 'mysql',
),
'memcache.locking' => '\\OC\\Memcache\\Redis',
'memcache.local' => '\\OC\\Memcache\\Redis',
'redis' =>
array (
'host' => '/tmp/sockets/redis.sock',
'port' => 0,
),
'log_type' => 'file',
'logfile' => '/var/snap/nextcloud/current/logs/nextcloud.log',
'logfilemode' => 416,
'passwordsalt' => =====REDACTED======
'secret' => =====REDACTED======
'trusted_domains' =>
array (
0 => 'localhost',
1 => 'ludoviko.me',
2 => '192.168.0.25',
3 => '66.131.197.88',
),
'datadirectory' => '/var/snap/nextcloud/common/nextcloud/data',
'dbtype' => 'mysql',
'version' => '25.0.4.1',
'overwrite.cli.url' => 'http://localhost',
'dbname' => 'nextcloud',
'dbhost' => 'localhost:/tmp/sockets/mysql.sock',
'dbport' => '',
'dbtableprefix' => 'oc_',
'mysql.utf8mb4' => true,
'dbuser' => 'nextcloud',
'dbpassword' => =====REDACTED======
'installed' => true,
'instanceid' => 'oc3nbxn74y0h',
'maintenance' => false,
'app_install_overwrite' =>
array (
0 => 'files_reader',
1 => 'files_ebookreader',
),
'mail_from_address' => 'ludoviko',
'mail_smtpmode' => 'smtp',
'mail_sendmailmode' => 'smtp',
'mail_domain' => 'gmx.com',
'mail_smtpsecure' => 'tls',
'mail_smtphost' => 'mail.gmx.com',
'mail_smtpport' => '587',
'mail_smtpauthtype' => 'LOGIN',
'mail_smtpauth' => 1,
'mail_smtpname' => 'kuatolives@gmx.com',
'mail_smtppassword' => '=====REDACTED======',
'theme' => '',
'loglevel' => 2,
);
The output of your Apache/nginx/system log in /var/log/____:
[Sun Apr 09 09:43:20.865124 2023] [ssl:warn] [pid 1050] AH01909: 127.0.1.1:443:0 server certificate does NOT include an ID which matches the server name
[Sun Apr 09 09:43:21.137419 2023] [ssl:warn] [pid 1158] AH01909: 127.0.1.1:443:0 server certificate does NOT include an ID which matches the server name
[Sun Apr 09 09:43:21.142880 2023] [mpm_prefork:notice] [pid 1158] AH00163: Apache/2.4.52 (Ubuntu) OpenSSL/3.0.2 configured -- resuming normal operations
[Sun Apr 09 09:43:21.142903 2023] [core:notice] [pid 1158] AH00094: Command line: '/usr/sbin/apache2'
[Sun Apr 09 09:50:42.404397 2023] [ssl:warn] [pid 1059] AH01909: 127.0.1.1:443:0 server certificate does NOT include an ID which matches the server name
[Sun Apr 09 09:50:42.662753 2023] [ssl:warn] [pid 1152] AH01909: 127.0.1.1:443:0 server certificate does NOT include an ID which matches the server name
[Sun Apr 09 09:50:42.676593 2023] [mpm_prefork:notice] [pid 1152] AH00163: Apache/2.4.52 (Ubuntu) OpenSSL/3.0.2 configured -- resuming normal operations
[Sun Apr 09 09:50:42.676615 2023] [core:notice] [pid 1152] AH00094: Command line: '/usr/sbin/apache2'
[Sun Apr 09 11:53:02.414207 2023] [mpm_prefork:notice] [pid 1152] AH00170: caught SIGWINCH, shutting down gracefully
[Sun Apr 09 11:53:02.532645 2023] [ssl:warn] [pid 65539] AH01909: 127.0.1.1:443:0 server certificate does NOT include an ID which matches the server name
[Sun Apr 09 11:53:02.582292 2023] [ssl:warn] [pid 65540] AH01909: 127.0.1.1:443:0 server certificate does NOT include an ID which matches the server name
[Sun Apr 09 11:53:02.588648 2023] [mpm_prefork:notice] [pid 65540] AH00163: Apache/2.4.52 (Ubuntu) OpenSSL/3.0.2 configured -- resuming normal operations
[Sun Apr 09 11:53:02.588750 2023] [core:notice] [pid 65540] AH00094: Command line: '/usr/sbin/apache2'
[Sun Apr 09 12:23:10.280033 2023] [php:error] [pid 65548] [client 127.0.0.1:49472] script '/var/www/html/index.php' not found or unable to stat
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.
todays nextcloud.log at /var/snap/nextcloud/current/logs is empty.
Pasting logs up to yesterday (when it was working) https://pastebin.com/LQhqfN1z
Thanks for your help!!!
