Dear Tanushree,

I hope you are doing good.

Can you try to run the below code with tm-0.5 version.

Please remove the existing package of tm.
remove.packages("tm")

Install the tm-0.5 package with the below command.

Later run the below R script and check.

DB<-read.csv("NFL_SocialMedia_sample_data1.csv",head=T)
head(DB)
social_text<-data.frame(DB[,1])
colnames(social_text)<-c("Contents")
corpus1<-Corpus(VectorSource(social_text$Contents))

corpus2<- tm_map(corpus1, tolower)
corpus3<- tm_map(corpus2, removeWords, stopwords("english"))

corpus4<- tm_map(corpus3, removePunctuation)

corpus5<- tm_map(corpus4, removeNumbers)
corpus6<- tm_map(corpus5, stripWhitespace)

dtm <- DocumentTermMatrix(corpus6)
dtm_tfxidf <- weightTfIdf(dtm) 
m <- as.matrix(dtm_tfxidf)
rownames(m) <- 1:nrow(m)
norm_eucl <- function(m) m/apply(m, MARGIN=1, FUN=function(x) sum(x^2)^.5)
m_norm <- norm_eucl(m)
cl <- kmeans(dtm_tfxidf, 10) 
cl

I have tried it on my end and it is working fine. Please refer to the below screenshot.