If you tap the Picture-in-Picture button on the Epson Account sign-in screen, you may not be able to sign in successfully.
Figure 1: Do not tap the Picture-in-Picture button.
When signing in, do not tap the Picture-in-Picture button.
If you have already tapped the Picture-in-Picture button,
tap the displayed Picture-in-Picture window to return to the sign-in screen,
then tap the Close button in the upper-left corner to close the sign-in screen.
After that, try signing in again.