call-interactively: Text is read-only: "Type `e' to edit property"

For me the problem occurred when I was had the buffer in column view and didn't press q to quit.

See https://lists.gnu.org/archive/html/emacs-orgmode/2009-03/msg00151.html for more details.

Saving the file, killing the buffer, and revisiting the file cleared up the problem for me.