# Installed Mautic 5.0.0-alpha1 via composer - getting error 500 **URL:** \ **Category:** General Discussion\ **Created:** [July 10, 2023, 4:58pm UTC](https://forum.mautic.org/t/installed-mautic-5-0-0-alpha1-via-composer-getting-error-500/28565 "2023-07-10T16:58:24Z")\ **Posts on this page:** 5\ **Page:** 1
**Author:** ![techbill](https://sea2.discourse-cdn.com/flex020/user_avatar/forum.mautic.org/techbill/32/8325_2.png) [@techbill](https://forum.mautic.org/u/techbill)\ **Post date:** [July 10, 2023, 4:58pm UTC](https://forum.mautic.org/t/installed-mautic-5-0-0-alpha1-via-composer-getting-error-500/28565/1 "2023-07-10T16:58:24Z")
I couldn’t find a 5.+ category in forum so I am posting it here under GD. Please move to correct category if this post is in the wrong category. I installed 5.0.0-alpha1 using composer and when I visit the web URL, it’s giving me a error 500 so I went to look the error log. Here the extract from error log ```auto PHP Fatal error: Failed opening required '/home/techbill/public_html/index.php' (include_path='.:/opt/cpanel/ea-php81/root/usr/share/pear') in Unknown on line 0 ``` The index.php is in the /home/techbill/public\_html folder so i am not sure why it fail to open it. Anyone have any idea why it failed? ![Screenshot 2023-07-10 at 11.55.21 AM](https://us1.discourse-cdn.com/flex020/uploads/mautic/original/2X/4/4ebc330f3fa2f86e0a919a2747aee28cc3c35f8f.png) There is a production composer installed Mautic 4.+ running on same server under cPanel so I doubt it something related to server or an server issue. ---
**Author:** ![silavapi](https://sea2.discourse-cdn.com/flex020/user_avatar/forum.mautic.org/silavapi/32/7424_2.png) [@silavapi](https://forum.mautic.org/u/silavapi)\ **Post date:** [July 22, 2023, 10:30pm UTC](https://forum.mautic.org/t/installed-mautic-5-0-0-alpha1-via-composer-getting-error-500/28565/2 "2023-07-22T22:30:50Z")
Hi @techbill - good call, we haven’t yet got a category as we’re still in alpha so most feedback comes via Slack / GitHub at this stage. My first thoughts would be the usual - have you checked the cache, checked the file/folder permissions and whatnot. I am not sure how much we’ve done regarding installing in different environments, but I would also suggest checking you’re running PHP 8.0 on the server as well, because you can’t use Mautic 5 with 7.4. ---
**Author:** ![techbill](https://sea2.discourse-cdn.com/flex020/user_avatar/forum.mautic.org/techbill/32/8325_2.png) [@techbill](https://forum.mautic.org/u/techbill)\ **Post date:** [July 25, 2023, 2:45pm UTC](https://forum.mautic.org/t/installed-mautic-5-0-0-alpha1-via-composer-getting-error-500/28565/3 "2023-07-25T14:45:38Z")
I am running 8.1 but I will change it down to 8.0 and try again. ---
**Author:** ![silavapi](https://sea2.discourse-cdn.com/flex020/user_avatar/forum.mautic.org/silavapi/32/7424_2.png) [@silavapi](https://forum.mautic.org/u/silavapi)\ **Post date:** [July 25, 2023, 4:56pm UTC](https://forum.mautic.org/t/installed-mautic-5-0-0-alpha1-via-composer-getting-error-500/28565/4 "2023-07-25T16:56:42Z")
Yeah 8.1 is not yet supported I don’t think - will have to check! ---
**Author:** ![techbill](https://sea2.discourse-cdn.com/flex020/user_avatar/forum.mautic.org/techbill/32/8325_2.png) [@techbill](https://forum.mautic.org/u/techbill)\ **Post date:** [July 27, 2023, 8:24pm UTC](https://forum.mautic.org/t/installed-mautic-5-0-0-alpha1-via-composer-getting-error-500/28565/5 "2023-07-27T20:24:55Z")
I haven’t be able to make more time to do further testing on 5 yet. I was very busy this summer and you probably noticed that since I wasn’t very chatty in the chat room lately 😛