R：运行INLA模型的as.character（x）错误槽

Question

我正在尝试在R中运行以下代码，但收到错误消息：

install.packages("INLA", repos=c(getOption("repos"), INLA="https://inla.r-inla-download.org/R/testing"), dep=TRUE)
df=read.xlsx("E:/data.xlsx", sheetName = "data", header=TRUE)
result<- inla(Count ~ Year + f(iYear, model='ar1'), family=poisson, data=df)

Error in `as.character(x)` : 
  cannot coerce type 'closure' to vector of type 'character'

任何帮助将不胜感激。