Hi @shahid,
I had the same issues in older versions of v13-beta before. Which version are you running right now?
Have a look into Bench lets-encrypt setup failing - #7 by JeansReal. At that time, the workaround with approach #2 did the trick for me.
In addition, have a look into certbot-auto deprecated · Issue #1105 · frappe/bench · GitHub, please.