vnse function in ie2misc package

Hello there, I am wondering why the result of vnse function for Nash Sutcliffe’s coefficient in Package ‘ie2misc’ (June 2020) is different when calculated by Cort et al. (2012)? For example, for the data shown below the vnse result is equal to 1.04 but the result from the equation is 0.87. #' obs <- 1:10 # observed #' pre <- 2:11 # predicted #' vnse(pre, obs)

Thanks in advance