我一直在使用Shiny / Flexdashboard几天，我的所有代码都停止工作，我只是得到会话或输入未找到错误。我尝试重新安装RStudio和R以及所有软件包，但它没有用。
运行我的代码时，我会得到类似的结果：
Warning: Error in dropNulls: objeto 'session' não encontrado
Stack trace (innermost first):
117: dropNulls
116: updateSelectizeInput
115: eval
114: eval
113: withVisible
112: withCallingHandlers
111: handle
110: timing_fn
109: evaluate_call
108: evaluate::evaluate
107: evaluate
106: in_dir
105: block_exec
104: call_block
103: process_group.block
102: process_group
101: withCallingHandlers
100: process_file
99: knitr::knit
98: <Anonymous>
97: do.call
96: contextFunc
95: .getReactiveEnvironment()$runWith
94: shiny::maskReactiveContext
93: <reactive>
82: doc
81: shiny::renderUI
80: func
79: origRenderFunc
78: output$__reactivedoc__
3: <Anonymous>
2: do.call
1: rmarkdown::run
Warning: Error in %in%: objeto 'input' não encontrado
Stack trace (innermost first):
73: %in%
72: [.data.frame
71: [ [<text>#13]
70: <reactive:sliderDatMP> [<text>#13]
59: sliderDatMP
58: observerFunc [<text>#36]
3: <Anonymous>
2: do.call
1: rmarkdown::run
ERROR: [on_request_read] connection reset by peer
但不仅仅是在我的代码中，我可以尝试在flexdashboard网站上运行简单的Old faithul example，同样的事情也会发生。
Screenshot of what I get running the Old faithul
我完全不知道发生了什么事，整个星期工作得很好，现在没什么作用。所有的帮助将不胜感激。
