Admin page gives HTTP ERROR 500

After succesfull installing fop2 on Ubuntu 18.x server gives us an error opening the 'Admin' page in the webbrowser, the 'fop2' site is accessable and working fine. If I browse to http:///fop2/admin the webrowser returns the 'HTTP ERROR 500' and in the Apache2 Errorlog a error is appended with these lines:
[Tue Oct 01 00:09:38.698443 2019] [mpm_prefork:notice] [pid 860] AH00163: Apache/2.4.29 (Ubuntu) configured -- resuming normal operations
[Tue Oct 01 00:09:38.702288 2019] [core:notice] [pid 860] AH00094: Command line: '/usr/sbin/apache2'
[Tue Oct 01 17:09:27.927268 2019] [php7:error] [pid 37838] [client] PHP Fatal error: Uncaught Error: Call to undefined function simplexml_load_file() in /var/www/html/fop2/admin/system.php:385\nStack trace:\n#0 /var/www/html/fop2/admin/index.php(6): require_once()\n#1 {main}\n thrown in /var/www/html/fop2/admin/system.php on line 385

Can anyone explain me what's wrong?


  • Hi,
    You must install the php-xml module or similar, not sure how it is named in Ubuntu. After installing, restart the web server and try again.

    Best regards,

  • Hello Nicolas,
    Spot on! Works like charm.. thanks again for the support for this amazing program!
    Best regards

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