Ubuntu 20.04) Actioning OK button via a shortcut

[robbyn]

Ubuntu 20.04
Libreoffice 6.4.7.2
English
This query is about using a macro to eventually run a special paste.
The shortcut for OK is Alt O but it does not work for me.

What can I do to get the ok button to action using a shortcut?

(the OK button does work if I use the mouse)

[robleyd]

Same question cross posted at AskLibreOffice

If you cross post, please let us know that you have done so, otherwise it leads to several discussions and a waste of time because several identical answers may be posted by different users.