# Installation Issue. Please assist
**URL:** https://forum.mautic.org/t/installation-issue-please-assist/28996
**Category:** Mautic 4 Install/Upgrade Support
**Tags:** development
**Created:** [August 19, 2023, 4:41am UTC](https://forum.mautic.org/t/installation-issue-please-assist/28996 "2023-08-19T04:41:17Z")
**Posts on this page:** 2
**Page:** 1
### Author:  [@eventmassi](https://forum.mautic.org/u/eventmassi)
#### Post date: [August 19, 2023, 4:41am UTC](https://forum.mautic.org/t/installation-issue-please-assist/28996/1 "2023-08-19T04:41:17Z")
Installed Mautic on Amazon Ec2 Instance
My Mautic Version is:Mautic 4.4.9
My PHP version is :PHP 8.0.28 (cli) (built: Mar 28 2023 17:41:50) ( NTS )
My MySQL/MariaDB version is :mysql Ver 15.1 Distrib 5.5.68-MariaDB, for Linux (x86\_64) using readline 5.1
My Composer Version is: version 2.5.8 2023-06-09 17:13:21
My httpd(Apache) Version is Server version: Apache/2.4.57 ()
These errors are showing in the Httpd log :
Wed Aug 16 12:58:05.199335 2023] [mpm\_prefork:notice] [pid 13802] AH00170: caught SIGWINCH, shutting down gracefully
[Wed Aug 16 12:58:06.273475 2023] [suexec:notice] [pid 16310] AH01232: suEXEC mechanism enabled (wrapper: /usr/sbin/suexec)
[Wed Aug 16 12:58:06.288006 2023] [lbmethod\_heartbeat:notice] [pid 16310] AH02282: No slotmem from mod\_heartmonitor
[Wed Aug 16 12:58:06.288061 2023] [http2:warn] [pid 16310] AH10034: The mpm module (prefork.c) is not supported by mod\_http2. The mpm determines how things are processed $
[Wed Aug 16 12:58:06.291135 2023] [mpm\_prefork:notice] [pid 16310] AH00163: Apache/2.4.57 () configured – resuming normal operations
[Wed Aug 16 12:58:06.291152 2023] [core:notice] [pid 16310] AH00094: Command line: ‘/usr/sbin/httpd -D FOREGROUND’
These errors are showing in the php error log:
6-Aug-2023 10:17:03 UTC] PHP Warning - Undefined variable $inline - in file /var/www/html/mautic/offline.php - at line 77
[16-Aug-2023 10:17:03 UTC] PHP Warning: Undefined variable $inline in /var/www/html/mautic/offline.php on line 77
[16-Aug-2023 10:17:03 UTC] LogicException: Extension DOM is required. - in file /var/www/html/mautic/vendor/symfony/config/Util/XmlUtils.php - at line 50
_Your problem_
My problem is :
when i open public ip on which mautic is installed it says:
The site is currently offline due to encountering an error. If the problem persists, please contact the system administrator.
System administrators, check server logs for errors.
[http://44.212.65.107/mautic](http://44.212.65.107/mautic)
Steps I have tried to fix the problem :
changed ownership of files of mautic that was in var/www/html/mautic to apache:apache user
---
### Author:  [@EJL](https://forum.mautic.org/u/EJL)
#### Post date: [August 21, 2023, 2:05pm UTC](https://forum.mautic.org/t/installation-issue-please-assist/28996/2 "2023-08-21T14:05:05Z")
run **/bin/console cache:clear** cron to clear cache and then refresh
as an alternative you can delete the contents of the folder var/cache/prod