Hi Alex, I installed emacs modified for MacOS from<> . I reinstalled but got the same error as before: Debugger entered--Lisp error: (cyclic-function-indirection ess-r-mode) commandp(ess-r-mode) #f(compiled-function (sym) #<bytecode 0x40f9c7cd>)(ess-r-mode) all-completions("" [0...