While using ggplot with Titanic dataset I am getting the error "Problem computing aesthetics. Error occurred...object not found

Question

Here is the code followed by the error code. The variable new.title was created and then used in the code, but for whatever reason I am getting the error and cannot find what I have missed.

    data.combined$new.title <- as.factor(titles)

    ggplot(data.combined[1:891,], aes(x = new.title, fill = survived)) +
      geom_bar() +
      facet_wrap(~Pclass) + 
      ggtitle("Surival Rates for new.title by pclass")

Error in geom_bar(): ! Problem while computing aesthetics.

ℹ Error occurred in the 1st layer.

Caused by error in FUN():

! object 'new.title' not found

Run rlang::last_error() to see where the error occurred.

I was attempting to produce a bar graph that presented the survival by Pclass from the Titanic sinking. After re-mapping the titles for the passengers' names I created the variable and then attempted to plot the results.

Instead of the plot I got the error code that I have shared.