I found the solution. The chown -R comand change the owner of the files inside the htdocs folder.
For fix this, we need to correcto the owner of the files. I saw in a past installation, that the owner was root:daemon
sudo chown -R root:daemon htdocs/
But still dont work.
I saw in this post: https://community.bitnami.com/t/how-to-install-mautic/35609/3
How to manualy install mautic, and how define the owner with this comand
If Lamp is installed as user
chown -R your_user:your_user /your_installation_directory/apps/mautic/htdocs
If Lamp is installed as root
chown -R root:daemon /your_installation_directory/apps/mautic/htdocs
chmod -R g+w app/cache/
chmod -R g+w app/logs/
chmod -R g+w app/config/
And with the last tree sentence we delete the cache, with this, the mautic works again. And i can change the logo as on the beginning tutorial says.