Admin extremely slow load

[quentino.cz]

Hi,

my backoffice started to load extremely slow (300+seconds), the fron office is ok, I have disabled addons API calls.

Only way the backoffice is usable is in debug mode, which loads with one error, see below.

I tried to rule out everything and this seems to make the difference in the debug mode  define('_PS_DEBUG_SQL_', true);

No idea though where might be the issue, any help please?

 

 

Warning na řádku 0 v souboru /home/domains/XXXX.com/web/public/classes/ConfigurationKPI.php
[2] Declaration of ConfigurationKPICore::get($key, $id_lang = NULL, $id_shop_group = NULL, $id_shop = NULL) should be compatible with Configuration::get($key, $idLang = NULL, $idShopGroup = NULL, $idShop = NULL, $default = false)