The external link that takes me to the articles and "Contact me" form don’t work. "Error 404 not found "

Hello,
I deployed on Netlify using github, a website created on R using Hugo blogdown. The site is published without any problem but I have a problem with the publications. The external link that takes me to the articles doesn’t work. "Error 404 not found ". Althought all works fine locally. Also I have a problem with the "contact me " form in the end of my site when users send me a message I receive nothing.
You can find my code here : GitHub - BOUGHANMIChaima/hel_oua_ws
The problems are in folder publication and contact.
How can I fix this please?
Thank you in advance

This is my web site : helaouali.netlify.app
When I click on “Source document” in each publication it prefix each lik my my website like this for ewemple : “https://helaouaili.netlify.app/https:/www.academia.edu/16796397/Théorie_des_Sondages_chap3_Formalisation_du_Modèle_de_théorie_des_Sondages
Instead of taking me to “www.academia.edu/16796397/Th%C3%A9orie_des_Sondages_chap3_Formalisation_du_Mod%C3%A8le_de_th%C3%A9orie_des_Sondages” it makes "“https://helaouaili.netlify.app/” before each link, it’s like an internal link how can I remove this pleaaase !
Thank you in advance !

Just FYI, your baseURL is empty, unless you add it via the command line.

We discussed this a few days ago…
https://discourse.gohugo.io/t/47852