Jekyll error: invalid byte sequence in US-ASCII

#  Jekyll error
#  invalid byte sequence in US-ASCII

# Error reading file /PATH/TO/FILE : invalid byte sequence in US-ASCII
# Liquid Exception: invalid byte sequence in US-ASCII in index.html

# Add This variables that change your local settings
# In your prompt

LC_CTYPE="en_US.UTF-8"
LANG="en_US.UTF-8"

# Now it should work 

Jekyll serve  # YEP It works!!

For me it only worked when using the following

export LC_CTYPE="en_US.UTF-8"
export LANG="en_US.UTF-8"