Hi Santosh,
I am unable to see any image you provided but I can able to help you.
Go to application modeller change the Login Button "Element Type" to "HTML Element".
Then take a navigate stage 3 action will be there, 1st one take as activating Window, then drag that login button select focus, then use gloal send keys to pass value as "Enter".
It will definitely work as I am also automating Ariba portal So I have idea.
🙂Any doubt please feel free to ask.
PFA ScreenShot fyi,
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Amlan Sahoo
RPA Consultant
Equinix
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Regards,
Amlan Sahoo