# Landing autoload.php error

**URL:** <https://forum.mautic.org/t/landing-autoload-php-error/29222>\
**Category:** Product Support\
**Created:** [September 8, 2023, 8:17am UTC](https://forum.mautic.org/t/landing-autoload-php-error/29222 "2023-09-08T08:17:34Z")\
**Posts on this page:** 1\
**Page:** 1

<div class="post-metadata">

**Author:** ![antonio-lazzari](https://sea2.discourse-cdn.com/flex020/user_avatar/forum.mautic.org/antonio-lazzari/32/737_2.png) [@antonio-lazzari](https://forum.mautic.org/u/antonio-lazzari)\
**Post date:** [September 8, 2023, 8:17am UTC](https://forum.mautic.org/t/landing-autoload-php-error/29222/1 "2023-09-08T08:17:34Z")

</div>

**Your software**  
My Mautic version is: 4.4.10  
My PHP version is: 8.0

**Your problem**  
My problem is:  
Hi folks I have this error:

1. I created a landing and I get the error below.
2. I cloned the landing and the page works (like all the other landings
3. I swapped the alias of the new one with the old one and now the old one works and the new one doesn’t  
Some idea? I solver with a 301 redirect but I will understand what is this  
Thanks

Fatal error: Uncaught Error: Class ‘ComposerAutoloaderInit5c2befda2e9957918d5a3f60d67c06f5’ not found in /home/…/vendor/autoload.php:25 Stack trace: #0 /home/…/autoload.php(3): require() #1 /home/…/index.php(16): require\_once(‘/home/…’) #2 {main} thrown in /home/…/vendor/autoload.php on line 25