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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 6 (27.1.0)
Operating system and version (eg, Ubuntu 20.04): Linux 6.2.0-33-generic x86_64 Running VM on Proxmox
Apache or nginx version (eg, Apache 2.4.25): Apache 2.4.52
PHP version (eg, 7.4): 8.1.2
The issue you are facing:
Hello, every few minutes I receive the following error in my log. I don’t see any apparent impact, other than the error message. If it helps, I access my site using Cloudflare Tunnel.
The output of your Nextcloud log in Admin > Logging:
[no app in context] Error: OCP\Http\Client\LocalServerException: Could not detect any host at <<closure>>
0. /var/www/html/lib/private/Http/Client/Client.php line 295
OC\Http\Client\Client->preventLocalAddress()
1. /var/www/html/apps/integration_homeassistant/lib/Service/HassIntegrationService.php line 34
OC\Http\Client\Client->post()
2. /var/www/html/apps/integration_homeassistant/lib/Dashboard/TemplateWidget.php line 65
OCA\HassIntegration\Service\HassIntegrationService->getWidgetItems()
3. /var/www/html/apps/integration_homeassistant/lib/Dashboard/TemplateWidget.php line 54
OCA\HassIntegration\Dashboard\TemplateWidget->getItems()
4. /var/www/html/lib/private/Dashboard/Manager.php line 114
OCA\HassIntegration\Dashboard\TemplateWidget->load()
5. /var/www/html/lib/private/Dashboard/Manager.php line 138
OC\Dashboard\Manager->loadLazyPanels()
6. /var/www/html/apps/dashboard/lib/Controller/DashboardApiController.php line 85
OC\Dashboard\Manager->getWidgets()
7. /var/www/html/apps/dashboard/lib/Controller/DashboardApiController.php line 130
OCA\Dashboard\Controller\DashboardApiController->getShownWidgets()
8. /var/www/html/lib/private/AppFramework/Http/Dispatcher.php line 230
OCA\Dashboard\Controller\DashboardApiController->getWidgetItemsV2()
9. /var/www/html/lib/private/AppFramework/Http/Dispatcher.php line 137
OC\AppFramework\Http\Dispatcher->executeController()
10. /var/www/html/lib/private/AppFramework/App.php line 183
OC\AppFramework\Http\Dispatcher->dispatch()
11. /var/www/html/lib/private/Route/Router.php line 315
OC\AppFramework\App::main()
12. /var/www/html/ocs/v1.php line 64
OC\Route\Router->match()
13. /var/www/html/ocs/v2.php line 23
require_once("/var/www/html/ocs/v1.php")
GET /ocs/v2.php/apps/dashboard/api/v2/widget-items?widgets%5B%5D=activity
from 192.168.1.4 by shaywood at 2023-09-21T17:36:46+00:00
The output of your config.php file in /path/to/nextcloud (make sure you remove any identifiable information!):
<?php
$CONFIG = array (
'instanceid' => 'NUMUBER',
'passwordsalt' => 'PASSWORD',
'secret' => 'SECRET',
'trusted_domains' =>
array (
0 => '192.168.1.219',
1 => 'nextcloud.MYDOMAIN.com',
),
'datadirectory' => '/var/www/html/data',
'dbtype' => 'mysql',
'version' => '27.1.0.7',
'overwrite.cli.url' => 'http://192.168.1.219',
'dbname' => 'nextcloud',
'dbhost' => 'localhost',
'dbport' => '',
'dbtableprefix' => 'oc_',
'mysql.utf8mb4' => true,
'dbuser' => 'USER',
'dbpassword' => 'PASSWORD',
'installed' => true,
'enable_previews' => 'true',
'default_phone_region' => 'US',
'overwriteprotocol' => 'https',
'mail_from_address' => 'USER',
'mail_smtpmode' => 'smtp',
'mail_sendmailmode' => 'smtp',
'mail_domain' => 'gmail.com',
'mail_smtphost' => 'smtp.gmail.com',
'mail_smtpport' => '587',
'mail_smtpauth' => 1,
'mail_smtpname' => 'USER ',
'mail_smtppassword' => 'PASSWORD',
'onlyoffice' =>
array (
'verify_peer_off' => true,
),
'app_install_overwrite' =>
array (
0 => 'google_synchronization',
),
'maintenance' => false,
'theme' => '',
'loglevel' => 2,
);
The output of your Apache/nginx/system log in /var/log/____:
PASTE HERE
PASTE HERE
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.
PASTE HERE