Flexdashboard tabset not rendering

I have been struggling sizing within tabset using a variety of approaches and now trying framewidgets. But the tabs are now not rendering, or least the first one renders then no more.

I think it is something to do with setting as others have been able to run the code. Any ideas where to start to fix this. I think there must be something awry.

I am running R 4.03, Rstudio 1.3.1093 on windows 10.


title: "widgetframes"
output:
flexdashboard::flex_dashboard:
self_contained: FALSE
orientation: rows

library(flexdashboard)
library(leaflet)
library(DT)
library(dygraphs)
library(widgetframe)

Row {.tabset .tabset-fade}

Leaflet 02



l <- leaflet() %>% addProviderTiles(providers$CartoDB.DarkMatter) %>% setView(0,0,2)
frameWidget(l, height = '300')

Leaflet 01


k <- leaflet() %>% addTiles() %>% setView(0,0,2)
frameWidget(k, height = '300')

Row {.tabset .tabset-fade}

DT


dt <-  datatable(
  head(iris, 20), 
  options = list(
     columnDefs = list(list(className = 'dt-center', targets = 5)),
     pageLength = 5, lengthMenu = c(5, 10, 15, 20)),
  fillContainer = F)
frameWidget(dt, width = '95%')

dygraph

ts <- dygraph(nhtemp, main = "New Haven Temperatures")
frameWidget(ts, height = 300, width = '95%')

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