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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:
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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, 20.0.5): 25.0.2
Operating system and version (eg, Ubuntu 20.04): Ubuntu 22.04
Apache or nginx version (eg, Apache 2.4.25): Apache 2.4.54
PHP version (eg, 7.4): 8.1.13
The issue you are facing:
I’m getting “You are accessing your instance over a secure connection, however your instance is generating insecure URLs.” and “The “Strict-Transport-Security” HTTP header is not set to at least “15552000” seconds.” warnings despite being fairly certain that my nextcloud-le-ssl.conf is set correctly. I’m thinking that the issue is related to something I broke in apache, but I’m not sure what that’d be…
nextcloud-le-ssl.conf
<VirtualHost *:443>
DocumentRoot "/var/www/nextcloud"
ServerName nextcloud
<Directory "/var/www/nextcloud/">
Options MultiViews FollowSymlinks
AllowOverride All
Order allow,deny
Allow from all
</Directory>
TransferLog /var/log/apache2/nextcloud
ErrorLog /var/log/apache2/nextcloud
Header always set Strict-Transport-Security "max-age=63072000; includeSubDomains"
Include /etc/letsencrypt/options-ssl-apache.conf
ServerAlias cloud.saeumii.xyz
SSLCertificateFile /etc/letsencrypt/live/cloud.saeumii.xyz/fullchain.pem
SSLCertificateKeyFile /etc/letsencrypt/live/cloud.saeumii.xyz/privkey.pem
</VirtualHost>
</IfModule>
<IfModule mod_ssl.c>
<VirtualHost *:80>
DocumentRoot "/var/www/nextcloud"
ServerName cloud.saeumii.xyz
<Directory "/var/www/nextcloud/">
Options MultiViews FollowSymlinks
AllowOverride All
Order allow,deny
Allow from all
</Directory>
TransferLog /var/log/apache2/nextcloud.log
ErrorLog /var/log/apache2/nextcloud.log
</VirtualHost>
</IfModule>
Is this the first time you’ve seen this error? (Y/N):
Y
Steps to replicate it:
I’m not even sure. I think running updates broke something. I don’t remember seeing the warnings before doing “sudo apt install update” and “sudo apt autoremove” or whatnot
The output of your Nextcloud log in Admin > Logging:
Nothing that seems relevant [the most recent entry is as below]
dns_get_record(): A temporary server error occurred. at /var/www/nextcloud/lib/private/Http/Client/DnsPinMiddleware.php#83
The output of your config.php file in /path/to/nextcloud (make sure you remove any identifiable information!):
<?php
$CONFIG = array (
'instanceid' => 'occgteo5ijbf',
'passwordsalt' => '-',
'secret' => '-',
'trusted_domains' =>
array (
0 => 'cloud.saeumii.xyz',
),
'datadirectory' => '/var/www/nextcloud_data/data',
'dbtype' => 'mysql',
'version' => '25.0.2.3',
'overwrite.cli.url' => 'http://cloud.saeumii.xyz',
'dbname' => 'nextcloud',
'dbhost' => 'localhost',
'dbport' => '',
'dbtableprefix' => 'oc_',
'mysql.utf8mb4' => true,
'dbuser' => 'nextcloud',
'dbpassword' => '-',
'installed' => true,
'memcache.local' => '\\OC\\Memcache\\APCu',
'default_phone_region' => 'US',
'loglevel' => 2,
'maintenance' => false,
'theme' => '',
'mail_smtpmode' => 'smtp',
'mail_sendmailmode' => 'smtp',
'mail_smtpauthtype' => 'LOGIN',
'mail_smtpauth' => 1,
'mail_smtpname' => '',
'mail_smtppassword' => '',
);
The output of your Apache/nginx/system log in /var/log/____:
Not sure it has anything relevant
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.
Not sure that has anything relevant either. Will provide if necessary though
