Using L() in dynlm R [closed]

Currently going through the VAR section of the "Econometrics with R" online TB (https://www.econometrics-with-r.org/16.1-vector-autoregressions.html) but I am encountering an error.

I run the exact same code up to and including:

VAR_EQ1 <- dynlm(GDPGrowth ~ L(GDPGrowth, 1:2), + L(TSpread, 1:2),                 start = c(1981, 1),                 end = c(2012,4))

But get thrown the error:

" Error in L(TSpread, 1:2) : could not find function "L" "

As far as I am aware the L() function comes with the package "dynlm" which I have installed.

Can anyone help with this?