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, 20.0.5): 25.0.0 RC3
Operating system and version (eg, Ubuntu 20.04): Linux version 5.15.76-v8+ (dom@buildbot) (aarch64-linux-gnu-gcc-8 (Ubuntu/Linaro 8.4.0-3ubuntu1) 8.4.0, GNU ld (GNU Binutils for Ubuntu) 2.34)
Apache or nginx version (eg, Apache 2.4.25): Server version: Apache/2.4.54 (Debian)
PHP version (eg, 7.4): PHP 7.4.33 (cli)
The issue you are facing:
Sorry for the newbie question. I am not much of a savvy and have limited IT knowledge on coding etc, so please bear with me.
I am not able to connect to my nextcloud instance via its domain (nextcloud.domain.com) outside my wifi network at home. The instance is running on a Raspberry Pi 4 which is connected via wifi not ethernet. I have managed to get certbot and letsencrypt running so it has got https working well.
When I attempt to add calendar events from another network/IP, it adds the event in the device’s calendar but the instance doesn’t update as the device doesn’t connect to it. The landing page of my instance doesn’t open either.
As far as I know ports 80 and 443 have been open in my router.
What can I do to fix this?
Is this the first time you’ve seen this error? (Y/N): Yes
The output of your config.php file in /path/to/nextcloud (make sure you remove any identifiable information!):
<?php
$CONFIG = array (
'instanceid' => 'xxxx',
'passwordsalt' => 'xxxx',
'secret' => 'xxxx',
'trusted_domains' =>
array (
0 => '192.XXX.XXX.XXX',
1 => 'nextcloud.domain.com',
),
'datadirectory' => '/var/www/nextcloud/data',
'dbtype' => 'mysql',
'version' => '25.0.0.15',
'overwrite.cli.url' => 'https://nextcloud.domain.com',
'dbname' => 'nextcloud',
'dbhost' => 'localhost',
'dbport' => '',
'dbtableprefix' => 'oc_',
'mysql.utf8mb4' => true,
'dbuser' => 'nextcloud',
'dbpassword' => 'xxxx',
'installed' => true,
'memcache.local' => '\\OC\\Memcache\\APCu',
'default_phone_region' => 'GB',
'mail_from_address' => 'xxx',
'mail_smtpmode' => 'smtp',
'mail_sendmailmode' => 'smtp',
'mail_domain' => 'xxx.com',
'mail_smtpsecure' => 'tls',
'mail_smtpport' => '587',
'mail_smtphost' => 'xxx.com',
'mail_smtpauthtype' => 'LOGIN',
'mail_smtpauth' => 1,
'mail_smtpname' => 'xxx@xxx.com',
'mail_smtppassword' => 'xxxx',
'maintenance' => false,
'updater.secret' => 'xxxx',
);
The output of your Apache/nginx/system log in /var/log/____:
Not sure where to get this, is it the info in the apache2.conf file?
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 where to get this