Thread:Project:Support desk/ImageMagick Thumbnail error: "no decode delegate"; "no data returned"/reply (7)

in LocalSettings.php

before all settings for ImageMagick - add this environment var. for thumbnails to work

putenv ('MAGICK_CODER_MODULE_PATH=C:\Bitnami\mediawiki-1.23.6-0\imagemagick\modules\coders');