After an upgrade from 8.1 to 8.5, FocusInput is not longer accepts.

When I open a web page, I got an error message:

Non SecureLogin Error(3)
Error executing Application Definition line 19.

In line 19:
FocusInput #1:2

When I comment or remove all lines with FocusInput, it successful.

It's a bug in 8.5?