Website logs me out immediately after logging in on Sequoia
I created an account today on TaxAct.com. Each time I try to access the account, I go through the whole log-in rigamarole (user name, password, verification code texted to my iPhone and then entered.) It all looks good and I get through to the account landing page ("Start new Return") and then IMMEDIATELY I get logged out.
It has happened with Safari, Firefox, and Chrome, in both private/incognito windows and normal windows. All applications are fully up to date.
I have turned off adblockers and malware detection software.
I am using a 2021 MacBook Pro M1 Max with 64 GB RAM. The problem has occurred in both Sequoia 15.1 and 15.2.
I had no problem accessing the account on my wife's 2022 MacBook Air.
Suggestions? Thanks in advance.
[Re-Titled by Moderator]