While installing the module l10n_install-7.x-1.0-beta23-core on Drupal 7.21, I encountered this error. I ultimately resolved the issue by changing
upload_max_filesize = 2M in php.ini to: upload_max_filesize = 10M.
【唐诗】《送梓州李使君》 王維：萬壑樹參天，千山響杜鵑。山中一夜雨，樹杪百重泉。漢女輸橦布，巴人訟芋田。文翁翻教授，不敢倚先賢。