Invalid UTF-8 byte "F6

[Daniel]

Hi,

Suddenly, I am getting the error below when previewing. Does anyone know 
what might be the issue?

Best,
Daniel

--- below ---

! Package inputenc Error: Invalid UTF-8 byte "F6.

See the inputenc package documentation for explanation.
Type  H <return>  for immediate help.
  ...

l.7 \maketitle

The document does not appear to be in UTF-8 encoding.
Try adding \UseRawInputEncoding as the first line of the file
or specify an encoding such as \usepackage [latin1]{inputenc}
in the document preamble.
Alternatively, save the file in UTF-8 using your editor or another tool