M-s <left> is undefined.

[Hongyi Zhao]

Based on the document located at
<https://orgmode.org/manual/Built_002din-Table-Editor.html>, I try the
following instruction:

M-S-LEFT (org-table-delete-column)

Kill the current column.


But the keystroke combination doesn't work as expected, instead it
triggers the following info in the bottom minibuffer:

M-s <left> is undefined.

The environment is Ubuntu 20.10 with the self compiled latest git
master version of emacs and orgmode.

Any hints for this problem?

Regards
-- 
Assoc. Prof. Hongyi Zhao <hongyi.zhao@gmail.com>
Theory and Simulation of Materials
Hebei Polytechnic University of Science and Technology engineering
NO. 552 North Gangtie Road, Xingtai, China