LR Classic Locks Up when Uploading to SmugMug Gallery

I am running the latest version of LR Classic and the latest SmugMug Plug-in (v3.5.9.1).  I have a published gallery on SmugMug that is causing LR Classic to lock up anytime I try to upload an image to it.  I have gone so far as to completely delete the gallery from SmugMug and to re-create it, adding back all of the images that were originally in it.  When I do this, I am able to update the gallery with all the original images and everything works fine.  However, when I go to either add a new image to that gallery or re-publish an existing image, LR completely locks up.  I have attempted to enable Logging under the Debugging section of the Lightroom Plug-in Manager but I can't get it to work for some reason--I have checked <Enable Logging> but when I select the option <Open in Notepad>, nothing happens.  I'm at a loss as to why this one gallery is causing this.  I have no problems publishing to any other gallery.  

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