[Solved] Nextcloud 12 HTTP Error 500

Hi,
i use nextcloud 12 on Ubuntu 16.04.3 LTS Server.
HTTPS is enabeld with a certificate from let’s encrypt

When i go to my nextcloud Page i only get the HTTP Error 500.
I try to Reboot and
apt-get upgrade

But it doesnt help to fix the problem
’dbtype’ => ‘mysql’,
‘version’ => ‘12.0.0.29’,

PHP 7.0

LOG From /home/nextcloud_data

{“reqId”:“myVxFNq99CDBuNWP1zYY”,“level”:3,“time”:“2017-09-27T10:40:25+00:00”,“remoteAddr”:“109.192.22.208”,“user”:"–",“app”:“PHP”,“method”:“GET”,“url”:"/index.php",“message”:“Error: Call to undefined function OC\App\simplexml_load_file() at /var/www/nextcloud/lib/private/App/InfoParser.php#61”,“userAgent”:“Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/61.0.3163.79 Safari/537.36”,“version”:“12.0.0.29”}
{“reqId”:“9uLu03ahl8gNZCuMBUnT”,“level”:3,“time”:“2017-09-27T10:40:26+00:00”,“remoteAddr”:“109.192.22.208”,“user”:"–",“app”:“index”,“method”:“GET”,“url”:"/index.php",“message”:“Exception: {“Exception”:“Error”,“Message”:“Call to undefined function OC\\App\\simplexml_load_file()”,“Code”:0,“Trace”:”#0 \/var\/www\/nextcloud\/lib\/private\/legacy\/app.php(615): OC\\App\\InfoParser->parse(’\/var\/www\/nextcl…’)\n#1 \/var\/www\/nextcloud\/lib\/private\/AppFramework\/App.php(61): OC_App::getAppInfo(‘files’)\n#2 \/var\/www\/nextcloud\/lib\/private\/legacy\/app.php(190): OC\\AppFramework\\App::buildAppNamespace(‘files’)\n#3 \/var\/www\/nextcloud\/lib\/private\/legacy\/app.php(116): OC_App::registerAutoloading(‘files’, ‘\/var\/www\/nextcl…’)\n#4 \/var\/www\/nextcloud\/lib\/base.php(669): OC_App::loadApps(Array)\n#5 \/var\/www\/nextcloud\/lib\/base.php(1082): OC::init()\n#6 \/var\/www\/nextcloud\/index.php(38): require_once(’\/var\/www\/nextcl…’)\n#7 {main}",“File”:"\/var\/www\/nextcloud\/lib\/private\/App\/InfoParser.php",“Line”:61}",“userAgent”:“Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/61.0.3163.79 Safari/537.36”,“version”:“12.0.0.29”}
{“reqId”:“9uLu03ahl8gNZCuMBUnT”,“level”:3,“time”:“2017-09-27T10:40:26+00:00”,“remoteAddr”:“109.192.22.208”,“user”:"–",“app”:“PHP”,“method”:“GET”,“url”:"/index.php",“message”:“Error: Call to undefined function OC\App\simplexml_load_file() at /var/www/nextcloud/lib/private/App/InfoParser.php#61”,“userAgent”:“Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/61.0.3163.79 Safari/537.36”,“version”:“12.0.0.29”}

Fixed it

I’ve make a php upgrade an all modules are missing