Zed code completion not working

Correction, I actually did configure the language servers for both Elixir and HEEx file types. Here’s the relevant snippets from my settings.json file:

 "languages": {
    "Elixir": {
      "tab_size": 2,
      "language_servers": [
        "elixir-ls",
        "!next-ls",
        "!lexical",
        "tailwindcss-language-server",
        "emmet-language-server",
        "...",
      ],
    },
    "HEEx": {
      "tab_size": 2,
      "language_servers": [
        "elixir-ls",
        "!next-ls",
        "!lexical",
        "tailwindcss-language-server",
        "emmet-language-server",
        "...",
      ],
    },