It is a known problem with 19.1.0
1. Downgrade to 19.0.1
2. Wait for an update software patch.
3. Using your scanner's own software, scan to file and then open in Photoshop.
Thanks Iain, we're looking into this issue.
What a creat answer
it's been two weeks since the problem accured! I need my scanner!!! I can't downgrade, and my scanner has no own software working with win10... so I am dependend on PS working!