That error message is telling you that the elements you're using to build the data.frame are incompatible. Note in the repex below, stats is a vector of length one (a long character string), where eMail is empty. (a data frame must have columns of equal length)
A good way to understand what's happening here is to look at each of those html_text and html_nodes operations. See below,
url_base <- "https://www.daikinindia.com/products-services/daikin-dealer-locator"
library(rvest)
#> Loading required package: xml2
page <- read_html(url_base)
Dealer_Daiken <- data.frame(
State = html_text(html_nodes(page,"#state")),
City = html_text(html_nodes(page,"#city")),
Locality = html_text(html_nodes(page,"#locality")),
Organisation = html_text(html_nodes(page,".org_name")),
Del_Name = html_text(html_nodes(page,".d_name")),
Add = html_text(html_nodes(page,".d_add")),
PIN = html_text(html_nodes(page,".pin_clas")),
Phone = html_text(html_nodes(page,".phone_clas")),
Mobile = html_text(html_nodes(page,".mobile_class")),
eMail = html_text(html_nodes(page,".email_clas"))
)
#> Error in data.frame(State = html_text(html_nodes(page, "#state")), City = html_text(html_nodes(page, : arguments imply differing number of rows: 1, 0
# Note, one large character string
html_text(html_nodes(page,"#state"))
#> [1] "Select StateAndaman and Nicobar IslandsAndhra PradeshAssamBiharChandigarhChhattisgarhDadar & HaveliDelhiGoaGujaratHaryanaHimachal PradeshHyderabad Jammu & KashmirJharkhandKarnatakaKathmanduKeralaMadhya PradeshMaharashtraOdishaOrissaPondicherryPunjabRajasthanTamil NaduTelanganaTripuraUttar PradeshUttarakhandWest Bengal"
# Note, returns empty
html_text(html_nodes(page,".email_clas"))
#> character(0)
Created on 2020-04-16 by the reprex package (v0.3.0)
If you look at that web page, you'll see you need to fill out a set of dropdown fields and click submit in order for the page to display data. For that kind of web scraping you'll need to get R to interact with your web-browser. A popular tool for that is RSelenium
Here's the package vignette on getting that started,
https://cran.r-project.org/web/packages/RSelenium/vignettes/basics.html