[spiffyname]

I don't recall if it was this add-on or another one.

But try lowercase sensitivity for the email, but obviously for the password that can remain case sensitive. But even if the email contains capital letters. I've had issues with at least two add-ons which again I think this might have been one of them, where the email only worked for the login ID if it was all lower case sensitive.

I know one would think that shouldn't cause an issue, but it has. But again, I don't remember if it was with this add-on but I think it might have been. Because it did with at least two thst I recall.

FUNimation is one add-on that I can say definitely that happened with.

Thanks for the tip, but my username (and email address) is all lower-case letters.  I do have a period in my username so maybe that throws it off?  I don't think so however, because I've verified that the plug-in uses the correct username (email address).