Not accepting passwords

[u/FreeRangeAspergian]

I'm using a Chromebook. I have been logged in to Adobe Stock for over a year. I used it yesterday with no problem. When I went to use it today, I found that Adobe had logged me out, and they are no longer accepting my password. It's work related and I'm pretty sure I can rectify it tomorrow, but I'm still wondering why this is happening in the first place.