Undo and Redo buttons do not work

[atmajitg]

Hi team,

Thank you for your github repo. I noted that the undo and redo buttons operate properly in the online version https://lcfprep.com/wb2/wb.html . But when I download the code and execute the code using the board.html file those buttons do not work.

Could you please let me know if there is an easy fix or am I doing something wrong?

Thank you.

Regards,
Atmajit