500 internal error when I save and close the e-mail editor

Product Support Mautic 5 Install/Upgrade Support
14

Hi, this is upgrade from 5.0.1. I followed this tutorial to install M5.0.1:

https://mauteam.org/mautic/mautic-admins/mautic-5-installation-on-ubuntu-22-04-with-php-8-1-and-mariadb-11/

Than switched to composer with this tutorial:

https://docs.mautic.org/en/5.x/getting_started/switching_composer.html#:~:text=Here%E2%80%99s%20the%20steps%20to%20follow%20to%20switch%20to,point%20to%20%2Fvar%2Fwww%2Fhtml%2Fdocroot%20instead%20of%20%2Fvar%2Fwww%2Fhtml%20Altri%20elementi

Finally I upgrade to M5.0.3 with composer and followed this forum post because some dependencies where missing:

https://forum.mautic.org/t/4-4-10-5-0-1-fails-because-symfony-path-is-not-fount-in-parameterloader-php/30475/9