Hello, starting to use upload an image file function (png, jpg, ...).
The thumbnail fails to display on any page ...
"Error while creating Thumbnail. Error code: -1"
But the file is correctly uploaded and displayed if tryed.
Any idea ?
Jessie cloud hosted
MediaWiki 1.28.0
PHP Version 7.1.3
imagick module version 3.4.3RC1
ImageMagick release date 2017-05-23
Many thanks .