So i had the same problem with my Galaxy Note 9 and this is what i did. I had my Samsung account tied to a yahoo email. Trying to log into the Samsung account with my email and password (even a reset one) still left me not able to log in due to "process failed" and "wrong password" as users note above. So, i created a Samsung account using the Google login option. even though i used Google it still put me back to a login screen asking for an email and password. i entered the email address associated to my Google account i just used to "sign-up" and then used the same password I used to reset my password associated with the email. this let me in and then prompted a 2fa session which i used with my mobile. i got thru 2fA and then that put me back to the login screen. I logged in again using google and then entered the same password and that got me to the Reset, Confirm Delete All, and then the full factory reset. Hope this helps!
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