Save abbrevs in ~/.emacs.d/abbrev_defs? (y or n) Package assoc is obsolete! Core issue seems to be: "Package assoc is obsolete!" https://github.com/joaotavora/yasnippet/issues/242 Simply removing (require 'assoc) from yasnippet.el fixes the issue for me and doesn't seem to have any negative effects so far. I removed visual-basic-mode and now the error is no longer there.