Cannot add a new device to my account

[T-horn]

I have deleted all devices but two on my Dropbox account and am now trying to add a new tablet.  I can access the account from my existing laptop and phone, but whenever I try from the new tablet, it complains, "Sign-in failed.  Incorrect email or password." 

How can I get the tablet added to my linked devices?  This is a basic account.

[Mark]

Are only two devices showing at www.dropbox.com/account/security ?

[T-horn]

Yes, only two devices.  That's why I'm so puzzled. Three old ones were deleted about a week ago, and only two remain.  I can log onto Dropbox from them, but cannot add the new tablet using the same email and password.

[Hannah]

Hey @T-horn, have you tried uninstalling and reinstalling the Dropbox app, to see if that helps?

[T-horn · Accepted solution]

Yes, I deleted the app, downloaded and reinstalled.  Same result when signing in: "Incorrect email or password."

Just now, finally found my mistake in the login info:  used an Apostrophe instead of a Grave Accent -- I didn't realize they were different!