Widget Importer/Exporter Error

Hiya. I am having an error come up when I try to import the .wie file that the Widget Importer/Exporter plugin creates. It says “You must upload a .wie file generated by this plugin.”

I double checked the file, and it has the appropriate extension.

I also uninstalled and reinstalled the plugin. I’m not sure what else I can do for it. Any help/advice as to how to correct this would be welcome! I’d love to get this widget working again—it’s been very useful to me in the past.

Thank you.