title: How do I solve the following error?Input must be a character vector of any length or a list of character vectors, each of which has a length of 1
body: <p>I am working on a R project. The data set I used is available at the following link
  <a href="https://www.kaggle.com/ranjitha1/hotel-reviews-city-chennai/data" rel="nofollow noreferrer">https://www.kaggle.com/ranjitha1/hotel-reviews-city-chennai/data</a></p>
  <p>The code I have used is.</p>
  <pre><code>df1 = read.csv(&quot;chennai.csv&quot;, header = TRUE)
  library(tidytext)
  tidy_books &lt;- df1 %&gt;% unnest_tokens(word,Review_Text)
  </code></pre>
  <p>Here Review_Text is the text column. Yet, I get the following error.</p>
  <blockquote>
  <p>Error in check_input(x) :
  Input must be a character vector of any length or a list of character
  vectors, each of which has a length of 1.</p>
  </blockquote>