I get this error while upgrading to 1.6.1.16, someone can help to fix?
[Thu Aug 03 12:15:00.402569 2017] [php7:error] [pid 105932:tid 1948] [client ::1:51786] PHP Fatal error: Uncaught Error: [] operator not supported for strings in C:\\xampp\\htdocs\\prestashop162\\prestashop\\modules\\autoupgrade\\db\\DbQuery.php:70\nStack trace:\n#0 C:\\xampp\\htdocs\\prestashop162\\prestashop\\classes\\PrestaShopCollection.php(320): DbQueryCore->from('shop_url', 'a0')\n#1 C:\\xampp\\htdocs\\prestashop162\\prestashop\\classes\\PrestaShopCollection.php(397): PrestaShopCollectionCore->getAll()\n#2 C:\\xampp\\htdocs\\prestashop162\\prestashop\\classes\\Tools.php(2327): PrestaShopCollectionCore->rewind()\n#3 C:\\xampp\\htdocs\\prestashop162\\prestashop\\modules\\autoupgrade\\AdminSelfUpgrade.php(2588): ToolsCore::generateHtaccess('C:\\\\xampp\\\\htdocs...', true)\n#4 C:\\xampp\\htdocs\\prestashop162\\prestashop\\modules\\autoupgrade\\AdminSelfUpgrade.php(1964): AdminSelfUpgrade->doUpgrade()\n#5 C:\\xampp\\htdocs\\prestashop162\\prestashop\\admin948cjq3ap\\autoupgrade\\ajax-upgradetab.php(91): AdminSelfUpgrade->ajaxProcessUpgradeDb()\n#6 {main}\n thrown in C:\\xampp\\htdocs\\prestashop162\\prestashop\\modules\\autoupgrade\\db\\DbQuery.php on line 70
Found solution myself, just downgraded xampp.
SOLVED