Mx.7.5.1: Could not create widget HelpText.widget.HelpText

For upgrading from mx5.18 to 7.5.1 I downloaded latest version of HelpText widget from appstore.   Locally it works in all browsers. In the cloud however, it only works in chrome. In Edge and Firefox I get the error above.
1 answers

Per the GitHub readme for this widget:

This widget isn't actively supported, please use the better alternative: 'Bootstrap Tooltip' widget, for this purpose instead. Because this widget is used a lot, we decided to create a MX6 version, but we will not actively support this widget