App Composer custom button (created via Actions and Links) is unresponsive.

Summary:

Customer has created a simple button on App Composer to print "ButtonClicked" when clicked on run time log messages but when the button is clicked , it does not invoke the event and no print statement is printed in the log.

We are developing this in a sandbox which has all the necessary tools required to develop applications on app composer. And we have made multiple events and custom object to achieve this functionality, yet the button click action does not work and seems like it is disabled.

There are also no error messages in the log after the button is clicked.