SiteOrigin Editor Widget Issue

I have used this “SiteOrigin Editor” widget throughout my site. I love it. But as of last month or so the option to change font size within the widget has disappeared. I have updated the widget package and this was not successful. I have also tried to edit old widgets I set up when the option to change font size was available and I cannot change the font size there either. In those widgets the font size can be seen in the actual coding part of the widget editor. I have tried to replicate this coding as a temporary fix to the issue but it has rather clumsy results and I’m no coder.

This is the window I see when editing the SiteOrigin Editor widget content. As you can see, there is no option to change font size; there used to be a drop-down beside the Paragraph drop-down. Please help! This has become quite aggravating!

Thank you