I have a similar problem to the one asked here Exporting org file breaks when upgrading to orgmode 8.3, org-mode cannot export org files and raises this error:
apply: Wrong type argument: listp, #("Peter's Emacs Config" 0 19 (:parent (#0)))
The solution aw has given works for me, that is,
C-u M-x org-reload.
Nonetheless, I wanted to know why Emacs broke and how to fix such problems once and for all. Have not found anything on the Internet or on the GitHub page of org-mode.
I am using GNU Emacs 22.214.171.124 (x86_64-pc-linux-gnu, GTK+ Version 3.10.8) of 2016-10-26 and org-version 9.0.5.