باسلام .علت این ارور و اجرا نشدن برنامه چیه.ممنون اگه راهنمایی کنید
! Fatal fontspec error: "cannot-use-pdftex"
!
! The fontspec package requires either XeTeX or LuaTeX.
!
! You must change your typesetting engine to, e.g., "xelatex" or
! "lualatex"instead of plain "latex" or "pdflatex".
!
! See the fontspec documentation for further information.
!
! For immediate help type H <return>.
!...............................................
l.28 \msg_fatal:nn {fontspec} {cannot-use-pdftex}
