When going to the sign in page for Adobe Stock, there is no option to sign in with your Google ID. I have to go to the main adobe site, login with it, and then refresh the stock site now that I was logged in on the other site. The Facebook login button is there. Can Adobe please add the Google login button on the Stock sign in page? Sign in - Adobe ID
Have you tried to sign in on a different browser? Try to clear the cookies and cache and then check if you're able to login.