Cannot login to the sample app

[adamphh]

Hi there,
I can log in to the sample app before but now I can't do it anymore. It always show message "Login failed. Please try again". (https://prnt.sc/sy0ql5)
But I can log in to the website https://sandbox.authorize.net/ with the same username and password. https://prnt.sc/sy0s44
Can you please help?

[nmoerbeek]

I had the same thing happen to me, after I created a new password for my sandbox account it started working again.