部分路由本地测试通过，但是线上出错 #1499
Description
路由地址
/readhub/category/daily
/readhub/category/topic
/jike/topic/553870e8e4b0cafb0a1bef68
/jike/topic/55963702e4b0d84d2c30ce6f
预期是什么？
本地测试均通过，正常获取 RSS 内容，无错误
实际发生了什么？
https://rsshub.app/readhub/category/daily 和 https://rsshub.app/readhub/category/topic：
RSSHub 发生了一些意外:
TypeError: Cannot read property 'title' of null
at ctx.state.data.item.ctx.state.data.item.forEach (/app/lib/middleware/parameter.js:12:22)
at Array.forEach ()
at module.exports (/app/lib/middleware/parameter.js:11:33)
at processTicksAndRejections (internal/process/next_tick.js:81:5)
https://rsshub.app/jike/topic/553870e8e4b0cafb0a1bef68 和 https://rsshub.app/jike/topic/55963702e4b0d84d2c30ce6f：
RSSHub 发生了一些意外:
TypeError: html.replace is not a function
at Object.decode (/app/node_modules/he/he.js:232:15)
at ctx.state.data.item.ctx.state.data.item.forEach (/app/lib/middleware/parameter.js:13:60)
at Array.forEach ()
at module.exports (/app/lib/middleware/parameter.js:11:33)
at processTicksAndRejections (internal/process/next_tick.js:81:5)
部署相关信息
| Env | Value |
|---|---|
| OS | macOS 10.14 |
| Node version | 10.15 |
| if Docker, version |
额外信息（日志、报错等）
本地版本 Hash：41ac7ebbc242112477cc8104d97326e6d3a137d7