Resolved: Having an error in line 26

I am getting an error in Line 26 and cant figure out what is wrong with it

library("ggplot2")
library("dplyr")
library("reshape2")

df_engine_type <- read.csv("stacked_area_chart_data.csv",
                            header = TRUE,
                            sep = ",")
temp <- select(df_engine_type, -matches("Other"))
new_engine_types <- melt(temp, id.vars = "Year")
area_chart <- ggplot(new_engine_types,
                      aes(x = Year,
                          y = value,
                          fill = variable)) +
                      geom_area() +
                scale_fill_manual(values = c("#ef2026",
                                             "#7e2987",
                                             "#011638")) +
                theme_classic() +
                theme(legend.justification = c(0.01, 1),
                      legend.position =  c(0.01, 1)) +
                       labs(fill = "Engine Type ") +
                       ylab("Number of Cars")  +
                       ggtitle("Popularity of Engine Fuel Types (1982 - 2016)")
                theme(axis.text.x = element_text(angle = 90,
                                                 vjust = 0.5)) +
                scale_x_continuous(breaks = new_engine_types$Year)
area_chart

Console shows

+                 scale_x_continuous(breaks = new_engine_types$Year) 
Error in `+.gg`: 
! Can't add `scale_x_continuous(breaks = new_engine_types$Year)` to a theme object. 
Run `rlang::last_error()` to see where the error occurred.