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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: 28.0.2
Operating system and version: 22.04.4 LTS
Apache or nginx version: 2.4.52
PHP version: 8.1
The issue you are facing:
Is this the first time you’ve seen this error? (Y/N):Y
Steps to replicate it:
- nextcloud integrates nextcloud office and uses the built-in Collabora Online - Built-in CODE Server; nextcloud office works normally;
- After I changed the 443 port of my nextcloud https to 1348, the following error will appear every 5 minutes.
- The following error will appear in the log, but the nextcloud office still works normally.
The output of your Nextcloud log in Admin > Logging:
Error richdocuments
ConnectException
cURL error 7: Failed to connect to nextcloud.mydomain.top port 443 after 2 ms: Connection refused (see https://curl.haxx.se/libcurl/c/libcurl-errors.html) for https://nextcloud. mydomain.top/apps/richdocumentscode/proxy.php?req=/hosting/capabilities
Failed to fetch the Collabora capabilities endpoint: cURL error 7: Failed to connect to nextcloud.mydomain.top port 443 after 2 ms: Connection refused (see https://curl.haxx.se/libcurl/c/libcurl-errors.html ) for https://nextcloud.mydomain.top/apps/richdocumentscode/proxy.php?req=/hosting/capabilities”
<?php
$CONFIG = array (
'passwordsalt' => 'PZ3HeEsvpRpvvMAhVJ2aFNKLnVlmLS',
'secret' => '2rPBsJgE/MTQJeUyfZ8xokhJbYs2HyI2ryyOCq3bV96t89I8',
'trusted_domains' =>
array (
0 => 'localhost',
1 => 'nextcloud.mydomain.top',
2 => 'nextcloud.mydomain.top:1348',
),
'datadirectory' => '/var/www/nextcloud/data',
'dbtype' => 'mysql',
'version' => '28.0.2.5',
'overwrite.cli.url' => 'http://nextcloud.mydomian.top',
'dbname' => 'nextcloud',
'dbhost' => 'localhost',
'dbport' => '',
'dbtableprefix' => 'oc_',
'mysql.utf8mb4' => true,
'dbuser' => 'nextcloud',
'dbpassword' => 'passw@rd',
'installed' => true,
'instanceid' => 'oc89j3lj0737',
'memcache.local' => '\\OC\\Memcache\\APCu',
'filelocking.enabled' => 'true',
'memcache.locking' => '\\OC\\Memcache\\Redis',
'maintenance_window_start' => 1,
'redis' =>
array (
'host' => '/var/run/redis/redis.sock',
'port' => 0,
'dbindex' => 0,
'password' => '',
'timeout' => 1.5,
),
'ldapProviderFactory' => 'OCA\\User_LDAP\\LDAPProviderFactory',
'htaccess.RewriteBase' => '/',
'mail_from_address' => 'cjw',
'mail_smtpmode' => 'smtp',
'mail_sendmailmode' => 'smtp',
'mail_domain' => 'mydomain.top',
'mail_smtphost' => 'smtp.mydomain.top',
'mail_smtpport' => '25',
'app_install_overwrite' =>
array (
0 => 'news',
1 => 'files_reader',
2 => 'unsplash',
),
'defaultapp' => 'dashboard,files,deck',
'twofactor_enforced' => 'true',
'twofactor_enforced_groups' =>
array (
0 => 'PUXI-USER',
),
'twofactor_enforced_excluded_groups' =>
array (
),
'updater.release.channel' => 'stable',
);
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The output of your Apache/nginx/system log in `/var/log/____`:
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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.
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1. Why not use 1348 port instead of 443 for checking? I manually used port 1348 to check and it was successful
2. How do I change the default inspection port to 1348?