After logging in to Strategy for Office on Google Chrome version 78 or Firefox version 70, the Import Data and Prepare Data buttons do not appear. You can still click the invisible button to import or prepare data, but the button never displays.

The reason these buttons are not displaying is because of parsing CSS changes in Google Chrome version 78 and Firefox 70. As a result, the opacity for the button class has been changed from 100% to 1%.
If you are using Strategy for Office on 2019 Update 3 or 2019 Update 4, please use a previous version of Google Chrome 78 or Firefox 70 with the add-in. Alternatively, you can use a different browser like Safari or Internet Explorer.