Unable to scrape website with form using rvest

I am trying to scrape the the following website listed below. I tried to do this by using rvest with the code below.

My attempt was to try to replicate the PUT that I found in Google Chrome for the Download button. I'm not sure what I'm doing wrong. I am getting the error listed in my reprex .

  library(httr)
  library(rvest)
  library(dplyr)
#> 
#> Attaching package: 'dplyr'
#> The following objects are masked from 'package:stats':
#> 
#>     filter, lag
#> The following objects are masked from 'package:base':
#> 
#>     intersect, setdiff, setequal, union

  
  
  url <- "https://nfc.shgn.com/adp/baseball"
  pgsession <- session(url)
  
  pgform <- html_form(pgsession)[[2]]

  filled_form <- html_form_set(pgform,
                            team_id = "0", from_date = "2020-10-01", to_date = "2021-02-19", num_teams = "0",
                            draft_type = "0", sport = "baseball", position = "",
                            league_teams = "0" )
#> Warning: Setting value of hidden field 'team_id'.
#> Warning: Setting value of hidden field 'from_date'.
#> Warning: Setting value of hidden field 'to_date'.
#> Warning: Setting value of hidden field 'num_teams'.
#> Warning: Setting value of hidden field 'draft_type'.
#> Warning: Setting value of hidden field 'sport'.
#> Warning: Setting value of hidden field 'position'.
#> Warning: Setting value of hidden field 'league_teams'.
  
  session_submit(x = pgsession, form = filled_form)
#> Error: `form` doesn't contain a `action` attribute