Fatal error: Uncaught Error: Call to undefined function PrestaShop\PrestaShop\Core\Addon\Theme\json_decode() in /var/www/vhosts/perdikis.gr/httpdocs/src/Core/Addon/Theme/ThemeRepository.php:143 Stack trace: #0 /var/www/vhosts/perdikis.gr/httpdocs/src/Core/Addon/Theme/ThemeRepository.php(63): PrestaShop\PrestaShop\Core\Addon\Theme\ThemeRepository->getConfigFromFile('/var/www/vhosts...') #1 /var/www/vhosts/perdikis.gr/httpdocs/classes/shop/Shop.php(491): PrestaShop\PrestaShop\Core\Addon\Theme\ThemeRepository->getInstanceByName('classic') #2 /var/www/vhosts/perdikis.gr/httpdocs/classes/shop/Shop.php(135): ShopCore->setTheme() #3 /var/www/vhosts/perdikis.gr/httpdocs/classes/shop/Shop.php(414): ShopCore->__construct('1') #4 /var/www/vhosts/perdikis.gr/httpdocs/config/config.inc.php(117): ShopCore::initialize() #5 /var/www/vhosts/perdikis.gr/httpdocs/index.php(27): require('/var/www/vhosts...') #6 {main} thrown in /var/www/vhosts/perdikis.gr/httpdocs/src/Core/Addon/Theme/ThemeRepository.php on line 143