Uncaught Error: Call to undefined function Andig\imagecreatefromstring()

[der-domi]

I'm using the latest/master version. Currently I'm facing following issue. Is there went something wrong in one of the commits?

Thanks, Dominik

Downloading recent FRITZ!Box phonebook
No special attributes are saved!
Downloading vCard(s) from account XXX
    0 [>---------------------------]
    1 [->--------------------------]
Downloaded 130 vCard(s)
Downloading vCard(s) from account XXX
    0 [>---------------------------]
    1 [->--------------------------]
Downloaded 16 vCard(s)
Downloaded 146 vCard(s) in total
Dissolving groups (e.g. iCloud)
Dissolved 0 group(s)
Filtering 146 vCard(s)
Filtered 79 vCard(s)
Detaching and uploading image(s)
  0/67 [>---------------------------]   0%
  7/67 [==>-------------------------]  10%PHP Fatal error:  Uncaught Error: Call to undefined function Andig\imagecreatefromstring() in /srv/src/functions.php:132
Stack trace:
#0 /srv/src/functions.php(187): Andig\convertPNGtoJPG('\x89PNG\r\n\x1A\n\x00\x00\x00\rIHD...')
#1 /srv/src/functions.php(255): Andig\getJPEGimage(Object(Sabre\VObject\Component\VCard))
#2 /srv/src/RunCommand.php(71): Andig\uploadImages(Array, Array, Array, Object(Closure))
#3 /srv/vendor/symfony/console/Command/Command.php(258): Andig\RunCommand->execute(Object(Symfony\Component\Console\Input\ArgvInput), Object(Symfony\Component\Console\Output\ConsoleOutput))
#4 /srv/vendor/symfony/console/Application.php(911): Symfony\Component\Console\Command\Command->run(Object(Symfony\Component\Console\Input\ArgvInput), Object(Symfony\Component\Console\Output\ConsoleOutput))
#5 /srv/vendor/symfony/console/Application.php(264): Symfony\Component\Console\Application->doRunCommand(Object(Andig\RunCommand), Object(Symfony\Component\Console\Input\ArgvInput), Object(Symfony\Component\Console\Output\ConsoleOutput)) in /srv/src/functions.php on line 132

[der-domi]

Sorry. I've created my own image. But the Dockerfile was not up-to-date.