windows环境时出现，问题Error creating thumbnail: convert: invalid argument for option `-thumbnail'
创建缩略图错误: convert: invalid argument for option `-thumbnail': 128x128! @ convert.c/ConvertImageCommand/2515.
在文件DefaultSettings.php里
找到 'ImageMagick' => '$path/convert -background white -thumbnail $widthx$height! $input PNG:$output',
修改为 'ImageMagick' => '$...