Unable to start R script from crontab - Ubuntu 22.04.4 LTS

I tried to start R script from crontab on ubuntu 22.04.4 LTS but script didnt start

my code (edited by nano crontab -e)

gives

50 9 * * * Rscript 1.r

crontab edited without nano crontab -e

gives

no crontab for rootcrontab -l

also gives no crontab for root

How can I solve this?