Below is some output from one of my students. I have never seen this error and 
tried a few things (updating packages for one) but am at a loss to help 
further. Would appreciate suggestions that I can pass along.

Here is the error. I tried an install.packages(“xml2”) which appeared to 
complete but the error persists.

> library("tidyverse")
Error: package or namespace load failed for ‘tidyverse’ in library.dynam(lib, 
package, package.lib):
DLL ‘xml2’ not found: maybe not installed for this architecture?

Here is the sessionInfo()

> sessionInfo()
R version 4.1.1 (2021-08-10)
Platform: x86_64-w64-mingw32/x64 (64-bit)
Running under: Windows 10 x64 (build 19042)

Matrix products: default

locale:
[1] LC_COLLATE=English_Canada.1252 LC_CTYPE=English_Canada.1252 
LC_MONETARY=English_Canada.1252 LC_NUMERIC=C  
[5] LC_TIME=English_Canada.1252  

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

loaded via a namespace (and not attached):
[1] Rcpp_1.0.7 cellranger_1.1.0 pillar_1.6.2 compiler_4.1.1 dbplyr_2.1.1 
forcats_0.5.1 tools_4.1.1  
[8] jsonlite_1.7.2 lubridate_1.7.10 lifecycle_1.0.0 tibble_3.1.4 gtable_0.3.0 
pkgconfig_2.0.3 rlang_0.4.11  
[15] reprex_2.0.1 DBI_1.1.1 haven_2.4.3 withr_2.4.2 dplyr_1.0.7 httr_1.4.2 
fs_1.5.0  
[22] generics_0.1.0 vctrs_0.3.8 hms_1.1.0 grid_4.1.1 tidyselect_1.1.1 
glue_1.4.2 R6_2.5.1  
[29] fansi_0.5.0 readxl_1.3.1 tzdb_0.1.2 tidyr_1.1.3 ggplot2_3.3.5 purrr_0.3.4 
readr_2.0.1  
[36] modelr_0.1.8 magrittr_2.0.1 backports_1.2.1 scales_1.1.1 ellipsis_0.3.2 
assertthat_0.2.1 colorspace_2.0-2
[43] utf8_1.2.2 munsell_0.5.0 broom_0.7.9 crayon_1.4.1 

-- 
Kevin E. Thorpe
Head of Biostatistics,  Applied Health Research Centre (AHRC)
Li Ka Shing Knowledge Institute of St. Michael's
Assistant Professor, Dalla Lana School of Public Health
University of Toronto
email: kevin.tho...@utoronto.ca  Tel: 416.864.5776  Fax: 416.864.3016

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