Undefined array key "description" in plugin/Dynamic.php

"{\"aid\":503532588,\"attribute\":0,\"cid\":353034704,\"copyright\":1,\"ctime\":1623493440,\"desc\":\"-\",\"dimension\":{\"height\":1520,\"rotate\":0,\"width\":720},\"duration\":69,\"dynamic\":\"#东方千夜帖##东方PROJECT##灵乌路空#\",\"item\":{\"at_control\":\"\"},\"jump_url\":\"bilibili:\\/\\/video\\/503532588\\/?page=1&player_preload=null&player_width=720&player_height=1520&player_rotate=0\",\"owner\":{\"face\":\"https:\\/\\/i1.hdslb.com\\/bfs\\/face\\/7fc888266fa8441bc8558ac420dc31771f829ff2.jpg\",\"mid\":357202897,\"name\":\"Akatsukijam\"},\"pic\":\"https:\\/\\/i2.hdslb.com\\/bfs\\/archive\\/0e6ee1bc58a6d78910b85ee082cf66ab9f448181.jpg\",\"player_info\":null,\"pubdate\":1623493440,\"rights\":{\"autoplay\":1,\"bp\":0,\"download\":0,\"elec\":0,\"hd5\":0,\"is_cooperation\":0,\"movie\":0,\"no_background\":0,\"no_reprint\":1,\"pay\":0,\"ugc_pay\":0,\"ugc_pay_preview\":0},\"short_link\":\"https:\\/\\/b23.tv\\/BV1tg411G7zL\",\"short_link_v2\":\"https:\\/\\/b23.tv\\/BV1tg411G7zL\",\"stat\":{\"aid\":503532588,\"coin\":0,\"danmaku\":0,\"dislike\":0,\"favorite\":1,\"his_rank\":0,\"like\":5,\"now_rank\":0,\"reply\":0,\"share\":0,\"view\":24},\"state\":0,\"tid\":17,\"title\":\"很有压迫感的阿空终符\",\"tname\":\"单机游戏\",\"up_from_v2\":8,\"videos\":1}"

https://api.vc.bilibili.com/topic_svr/v1/topic_svr/topic_new?topic_id=555 -> data -> cards -> 8 -> card

lkeme / BiliHelper-personal

Undefined array key "description" in plugin/Dynamic.php #92