Ive been trying to use the fixed paramter in the VARMA function, but I cant seem to get it right. I would love some help.

My code is the following:

fixed <- matrix(NA, nrow = 2, ncol = 2)
fixed[1,2] = 0
model <- VARMA(data, p = 1, q = 0, fixed = fixed, include.mean = FALSE)

and I get the error

Number of parameters: 0
Error in round(par, 4) : non-numeric argument to mathematical function

I tried using a True and False matrix too but it didnt work I'm using normal distributed data with 2 variables