I really love this plugin, thank you Kevin for the wonderful work.
Although I personally have had no problem with the plugin when testing it, one of the users of the website I manage wrote to me complaining she gets a log in window when trying to access the page from both Firefox and Internet Explorer on her laptop. She sent me a print of her screen.
Like you, I haven’t been able to replicate the error.
This is the page where it happened; the file is stored in our own site:
https://new.crrs.ca/newsletter/
Any suggestions at this point?