I created a Phoenix API (no ecto, no webpack, no html). Works great. I needed to add CORS functionality to the API so that another URL can access the API. mix.exs defp deps do [ ... {:cors_plug, "~> 2.0"} ] end router.ex pipeline :api do plug CORSPlug, origin: "*"…

I was getting the same warning. But, Without cors_plug. Did you get any solutions.

I got the solution for this. You have to update phoenix version 1.5.4 or more

Thanks - I’ll give it a try! Any idea why mix phx.new --version reports Phoenix v1.4.12 and mix phx reports Phoenix v1.4.17?

Thanks Serge, I’ll give it a try.

Updating for the version 1.5.4 worked for me, was 1.5.1. What I made: In mix.exs under function deps change the version of phoenix Run mix deps.get phoenix to download the new version Run mix deps.compile phoenix to compile the new version Thanks for the help

Elixir Programming Language Forum

CORS Error - warning: incompatible types

Questions & Help Questions

serge-lukianov January 25, 2021, 9:32pm 5

It looks like origin should be a list, i.e.

 plug CORSPlug, origin: ["*"]