odd error

i just tried to click on a link in evo (1.4.5) and got the error as
shown in the attached image. i hadn't made any changes at all to the
system - it just happened out of the blue.

anyone have any idea what this could be caused by?

thank you.

-- 
j w e ||   So let go jump in 
a a n ||   Oh well what you waiting for
c l j ||   It's alright
k l r ||   'Cos there's beauty in the breakdown