Plugin no longer working

I have been using the plugin for well over a year with no problems, however since the last update it no longer works on my site.

Currently I have the plugin set as a widget for the header section of the site, with a single group of about 20 images. Now, there is just a white band across the top of my site.

I have tried playing with the settings. If I go into the Widget settings and add a Widget name, then I get a single image width box on the right hand side of the screen with the widget name above it. There no longer seems to be any option to set the width of the widget, only the height (which is set to 150).

I am apparently using the latest version of the plugin. I have tried removing and reinstalling it and get the same results. I have also tried it in several browser versions (chrome, edge, firefox) with no success

The page I need help with: [log in to see the link]