Unable to login into Plex

I used Plex many years and trying to reinstall on a new Windows 10 PC. Trying to run Plex for Tivo to use with my Bolt.

I was able to update my Plex online account. However, when I run the download and attempt to login I am getting error message.

“username or password is incorrect”

However, I know this information is correct.

Any idea on how I can resolve this?

Please help. Thanks.