R Notebook Not Rendering HTML files

I've upgraded to R 3.5.1. I'm not sure what happened, but my notebooks will not preview inside google chrome or IE. They show fine in the RStudio console (except plotly but I know that is a tracked issue) but when I try to preview or knit to HTML, it is blank.

Does anyone else have this issue?

Code is below.

mc_allup_comp_tx <- moto_keegan %>%
  filter(state == 'TX', driver_bucket == 'young', rating_bucket == 'risky', v_bucket == 'new', cover == 'CM') %>%
  select(driver_bucket, rating_bucket, v_bucket, earned, incurred) %>%
  group_by(driver_bucket, rating_bucket, v_bucket) %>%
  summarise(sum_earned = sum(earned), sum_incurred = sum(incurred)) %>%
  mutate(loss_ratio = sum_incurred/sum_earned) %>%
#> Error in moto_keegan %>% filter(state == "TX", driver_bucket == "young", : could not find function "%>%"


Created on 2018-07-31 by the reprex package (v0.2.0).

EDIT: Here is the output after rendering the blank document. I am not sure if there is a clue in the following.

"C:/Users/JORDAN~1.HOW/AppData/Local/CONTIN~1/ANACON~1/envs/rstudio/Scripts/pandoc" +RTS -K512m -RTS trial.utf8.md --to html4 --from markdown+autolink_bare_uris+ascii_identifiers+tex_math_single_backslash --output trial.html --smart --email-obfuscation none --self-contained --standalone --section-divs --template "C:\Users\jordan.howell\Documents\R\R-3.5.1\library\rmarkdown\rmd\h\default.html" --no-highlight --variable highlightjs=1 --variable "theme:bootstrap" --include-in-header "C:\Users\JORDAN~1.HOW\AppData\Local\Temp\RtmpygBbBa\rmarkdown-str35604fc4133a.html" --mathjax --variable "mathjax-url:https://mathjax.rstudio.com/latest/MathJax.js?config=TeX-AMS-MML_HTMLorMML"

I also recently updated to R 3.5.1 and now have issues rendering HTML and PDF from .Rmd files. Even the basic template that RStudio provides when you create a new R Markdown file does not render. It seems to be looking for a template in "~\R\R-3.5.1\library\rmarkdown\rmd\latex\default-" (similar in your case). I wonder if there is an issue with this filepath.