Markers not appearing on map using leaflet package in R - with basic example

Question

I'm trying to use the leaflet package in R to produce an interactive map. Everything was working for me about a month ago, but now my map is appearing but I can't get the markers to appear. I tried using a simple example I found online but this has the same issue. I tried updating R, R studio, and all of my packages. I also tried the github development version of leaflet to no avail. Running this in an.Rmd file (also tried in a regular script). Please let me know if anyone has any ideas, thank you: My code:

library(leaflet)

leaflet() %>%
  addTiles() %>%  
  addMarkers(lng=174.768, lat=-36.852, popup="The birthplace of R")

My output:

I got the code from this site which shows what it's supposed to look like: https://rstudio.github.io/leaflet/

Session Info:

R version 4.1.3 (2022-03-10)
Platform: x86_64-w64-mingw32/x64 (64-bit)
Running under: Windows 10 x64 (build 19044)

Matrix products: default

locale:
[3] LC_COLLATE=English_United States.1252  LC_CTYPE=English_United States.1252    LC_MONETARY=English_United States.1252
[4] LC_NUMERIC=C                           LC_TIME=English_United States.1252    

attached base packages:
[3] stats     graphics  grDevices utils     datasets  methods   base     

other attached packages:
 [3] leaflet_2.1.0        lindia_0.9           ggannotate_0.1.0.900 shiny_1.7.1          esquisse_1.1.0       readxl_1.3.1        
 [7] haven_2.4.3          forcats_0.5.1        stringr_1.4.0        dplyr_1.0.8          purrr_0.3.4          readr_2.1.2         
[13] tidyr_1.2.0          tibble_3.1.6         ggplot2_3.3.5        tidyverse_1.3.1     

loaded via a namespace (and not attached):
  [3] colorspace_2.0-3       ellipsis_0.3.2         rio_0.5.29             rprojroot_2.0.2        parameters_0.17.0      fs_1.5.2              
  [7] mc2d_0.1-21            rstudioapi_0.13        farver_2.1.0           remotes_2.4.2          ggrepel_0.9.1          DT_0.21               
 [13] fansi_1.0.2            mvtnorm_1.1-3          lubridate_1.8.0        xml2_1.3.3             splines_4.1.3          cachem_1.0.6          
 [19] knitr_1.37             pkgload_1.2.4          zeallot_0.1.0          jsonlite_1.8.0         broom_0.7.12           dbplyr_2.1.1          
 [25] ggdist_3.1.1           clipr_0.8.0            compiler_4.1.3         httr_1.4.2             backports_1.4.1        assertthat_0.2.1      
 [31] Matrix_1.4-0           fastmap_1.1.0          cli_3.2.0              later_1.3.0            prettyunits_1.1.1      htmltools_0.5.2       
 [37] tools_4.1.3            ggstatsplot_0.9.1      gtable_0.3.0           glue_1.6.2             Rcpp_1.0.8.3           cellranger_1.1.0      
 [43] jquerylib_0.1.4        vctrs_0.3.8            nlme_3.1-155           crosstalk_1.2.0        insight_0.16.0         xfun_0.30             
 [49] brio_1.1.3             ps_1.6.0               testthat_3.1.2         openxlsx_4.2.5         rvest_1.0.2            mime_0.12             
 [55] miniUI_0.1.1.1         lifecycle_1.0.1        devtools_2.4.3         MASS_7.3-55            scales_1.1.1           hms_1.1.1             
 [61] promises_1.2.0.1       rematch2_2.1.2         RColorBrewer_1.1-2     yaml_2.3.5             curl_4.3.2             memoise_2.0.1         
 [67] gridExtra_2.3          datamods_1.2.0         sass_0.4.0             reshape_0.8.8          stringi_1.7.6          paletteer_1.4.0       
 [73] bayestestR_0.11.5      desc_1.4.1             pkgbuild_1.3.1         zip_2.2.0              rlang_1.0.2            pkgconfig_2.0.3       
 [79] distributional_0.3.0   lattice_0.20-45        patchwork_1.1.1        htmlwidgets_1.5.4      labeling_0.4.2         processx_3.5.2        
 [85] tidyselect_1.1.2       plyr_1.8.6             magrittr_2.0.2         R6_2.5.1               generics_0.1.2         DBI_1.1.2             
 [91] pillar_1.7.0           foreign_0.8-82         withr_2.5.0            mgcv_1.8-39            datawizard_0.3.0       performance_0.8.0     
 [97] modelr_0.1.8           crayon_1.5.0           WRS2_1.1-3             shinyWidgets_0.6.4     utf8_1.2.2             correlation_0.8.0     
[103] tzdb_0.2.0             usethis_2.1.5          grid_4.1.3             data.table_1.14.2      callr_3.7.0            reprex_2.0.1          
[109] digest_0.6.29          xtable_1.8-4           httpuv_1.6.5           statsExpressions_1.3.0 munsell_0.5.0          viridisLite_0.4.0     

Answer 1

I had the same result, and search for other example.

This one works

library(leaflet)

data(quakes)

leaflet(quakes) %>% addTiles() %>% addMarkers( clusterOptions = markerClusterOptions() )