After updating dependencies assets don't load

I have a bunch of JS files that are loaded into app.html.eex, and after updating my dependencies they are no longer loading. The path’s to the JS files are correct, and haven’t changed.

Does anyone have any idea which dependencies might be responsible for this?

Here’s the output from mix deps.get ...

mix deps.get phoenix_ecto mongodb_ecto
Resolving Hex dependencies...
Resolution completed in 0.501s
Unchanged:
  argon2_elixir 1.3.3
  artificery 0.4.3
  certifi 2.6.1
  combine 0.10.0
  connection 1.0.4
  cowboy 2.8.0
  cowboy_telemetry 0.3.1
  cowlib 2.9.1
  csv 2.4.1
  db_connection 1.1.3
  decimal 1.9.0
  distillery 2.1.1
  edeliver 1.8.0
  elixir_make 0.6.2
  file_system 0.2.10
  gettext 0.18.2
  hackney 1.17.4
  httpoison 1.8.0
  idna 6.1.1
  jason 1.2.2
  metrics 1.0.1
  mimerl 1.2.0
  parallel_stream 1.0.6
  parse_trans 3.3.1
  phoenix 1.5.8
  phoenix_html 2.14.3
  phoenix_live_dashboard 0.4.0
  phoenix_live_reload 1.3.0
  phoenix_live_view 0.15.4
  phoenix_pubsub 2.0.0
  plug_cowboy 2.4.1
  poolboy 1.5.2
  ranch 1.7.1
  sendgrid 2.0.0
  ssl_verify_fun 1.1.6
  stripity_stripe 2.17.0
  telemetry_metrics 0.6.0
  telemetry_poller 0.5.1
  tesla 1.4.0
  timex 3.7.3
  tzdata 1.1.0
  unicode_util_compat 0.7.0
  uri_query 0.1.2
Upgraded:
  ecto 2.0.6 => 2.1.6
  mime 1.5.0 => 1.6.0
  phoenix_ecto 3.0.1 => 3.4.0
  plug 1.11.0 => 1.14.0
  plug_crypto 1.2.1 => 1.2.3
  telemetry 0.4.2 => 0.4.3
New:
  mongodb 0.4.9
  mongodb_ecto 0.2.1
* Updating phoenix_live_reload (Hex package)
* Updating hackney (Hex package)
* Updating certifi (Hex package)
* Updating tesla (Hex package)
* Updating mime (Hex package)
* Updating tzdata (Hex package)
* Updating elixir_make (Hex package)
* Updating cowboy (Hex package)
* Updating cowlib (Hex package)
* Updating ranch (Hex package)
* Updating phoenix_live_view (Hex package)
* Updating phoenix_pubsub (Hex package)

Found the culprit, plug needed to be fixed at 1.11.0 and now my assets are loading again.