Power BI R Custom Visual loading, except Leaflet Tiles for the basemap

Hi! I'm trying to incorporate a R-Custom Visual using leaflet. I've been able to load the visual and everything works except the base map. 

Here's a snippet with the tile part of the code: 

shape <-leaflet()%>%
addTiles("https://{s}.tile.openstreetmap.fr/hot/{z}/{x}/{y}.png")%>%
addPolygons(data = treatmentplants,
color =~pal(DWMLabel),weight = 1,smoothFactor = 0.5,
opacity = 0.5, fillOpacity = 0.5,
highlightOptions = highlightOptions(color = "white", weight = 2,
bringToFront = FALSE),

I switched from my original input which was " addProviderTiles(providers$Esri.WorldGrayCanvas)%>%" because of this link on stackoverflow. Both ways aren't working. Is it because the baselayer is coming from online and PowerBI doesn't support that with R custom visuals? 

Thanks in advance!