[Solved] Problem in fresh install of

Hi there.
I’ve been testing the ojs 3.1 for a few days, but have been too much errors and decided to try Did a fresh install with all new db and server, the install went with no problem and I started to config the periodic. However, after setting the portal, the periodic config always go into a HTTP ERROR 500.
I turned on the php errors but nothing appear. I thought it could be a bad upload of files, so i re-uploaded all files, overighting them (except for config.inc). Then i got one error, but the site still stucked.

NOTICE: unserialize(): Error at offset 205 of 1323 bytes (/home/dpgpsifp/ojs2/lib/pkp/classes/db/DAO.inc.php:350)

I did a search on here, but nothing on this error. Any thoughts?

Server info:
Sistema Operacional Linux
Versão do PHP 5.6.32
Versão do Apache Indisponível
Driver da base de dados mysql
Versão do servidor de base de dados 5.6.36-cll-lve

I found a new error in php log:

[07-Nov-2017 21:55:02 UTC] PHP Fatal error: Class ‘Memcache’ not found in /home/dpgpsifp/ojs2/lib/pkp/classes/cache/MemcacheCache.inc.php on line 51

I have enabled memcache and it wont work, so i just changed to none in config.inc.