Error creating thumbnail: convert: memory allocation failed `/var/www/wiki.documentfoundation.org/images/e/e1/10_20_releases_zh_TW.xcf' @ error/xcf.c/ReadXCFImage/1363. convert: no images defined `/var/www/wiki.documentfoundation.org/images/tmp/transform_62d97dfa681a.png' @ error/convert.c/ConvertImageCommand/3229. Error code: 1