For the record, I pushed the issue with the hosting provider and a supervisor replied "It appear the imagick and it's dependencies were not fully installed. I have corrected this for you now. " It's working now. This may help others with this issue.
I think that was part of the problem. As I said, there was no sign of imagick in phpinfo.php so I strongly suspected that the Imagick PHP extension was missing. Now it is there and all is good.
Comments
For the record, I pushed the issue with the hosting provider and a supervisor replied "It appear the imagick and it's dependencies were not fully installed. I have corrected this for you now. " It's working now. This may help others with this issue.
You additionally need the Imagick PHP extension which hooks on ImageMagick. ImageMagick alone does not work.
http://php.net/manual/de/class.imagick.php
I think that was part of the problem. As I said, there was no sign of imagick in phpinfo.php so I strongly suspected that the Imagick PHP extension was missing. Now it is there and all is good.