Embedding Leaflet objects as popups doesn't work when generating an HTML file

[f8l5h9]

I am using popupGraph to include popups in a Leaflet object by passing a list of other Leaflet objects to generate an HTML file. Below is a reproducible example.

Everything works perfectly in my local R environment, but when I open the HTML file in a browser, it cannot find the Leaflet objects stored in the temporary folder. See https://emods.es/leafpop_problem.html
Do you have any suggestions on how I can embed the Leaflet objects as popups so that they are included in the final HTML output?

---

title: "leafpop"
author: ""
output: html_document

library(leaflet)
library(leafpop)
library(dplyr)

cities <- data.frame(
  city = c("Sevilla", "Cartagena", "Valencia"),
  lat = c(37.389092, 37.625683, 39.469907),
  lon = c(-5.984459, -1.001400, -0.376288)
)

mymap <- list()
for (i in 1:3){
mymap[[i]] <- leaflet() %>%
  addTiles() %>%
  setView(lng = cities[i,3], lat = cities[i,2], zoom = 16) 
}

leaflet() %>% 
  addTiles() %>%
  addMarkers(data=cities,~lon ,~lat,
                 popup = ~popupGraph(mymap))

[tim-salabim]

Thanks, this has been on my plate for a long time. For technical reasons from the htmlwidgets package, the way this is currently implemented means the popup htmls are saved to a location one level above where the map html is saved. If you keep this structure wherever you want to host this map, the popups should work as expected.
I have been meaning to provide a proper method that will embed the popups in the map html, but haven't found much time (and frankly forgot about it). I hope to get this working soon, as I already have a scaffold for it

[SamAllwood]

I think I have the same issue trying to use popups from leafpop inside a Shiny app? The output is an html and the popup images are not rendered, even though they are when creating the leaflet map outside the Shiny function.