plot之后显示 cannot coerce type 'S4' to vector of type 'double'

[xiaoyaojiushao]

按照示例做了一下，发现
`> province=data.frame(province)

View(province)
ph1<-remapC(province,maptype = 'china',

•         color = c('gray','white'),##颜色设置
  

•         theme = get_theme('none',
  

•                           lineColor='black',
  

•                           backgroundColor='white',
  

•                           titleColor='black',
  

•                           borderColor = "black"),
  

•         title = "",subtitle = "",
  

•         markPointTheme = markPointControl(),
  

•         mindata = 30000,
  

•         maxdata = 150000)
  

plot(ph1)
Error in as.double(y) :
cannot coerce type 'S4' to vector of type 'double'
`

我寻思着可能是版本的问题，但是还是没办法解决啊，求教大神

sessionInfo()
R version 4.0.2 (2020-06-22)
Platform: x86_64-w64-mingw32/x64 (64-bit)
Running under: Windows 10 x64 (build 18363)