`File is not being analyzed (Unknown error)` with Dart SDK version: 3.6.0

[willvio]

Describe the bug
LSP :: Error from the Language Server: File is not being analyzed (Unknown error) once opening a dart file. It seems that the issues mentioned in #169 and Dart-Code/Dart-Code#3929 were related to this but fixed afterwards. I updated my dart version to 3.6.0 but still nothing works.

To Reproduce
Launch emacs with emacs -q and evaluate the configuration code found in README

(require 'package)
(add-to-list 'package-archives '("melpa" . "http://melpa.org/packages/") t)
(package-initialize)

(setq package-selected-packages 
  '(dart-mode lsp-mode lsp-dart lsp-treemacs flycheck company
    ;; Optional packages
    lsp-ui company hover))

(when (cl-find-if-not #'package-installed-p package-selected-packages)
  (package-refresh-contents)
  (mapc #'package-install package-selected-packages))

(add-hook 'dart-mode-hook 'lsp)

(setq gc-cons-threshold (* 100 1024 1024)
      read-process-output-max (* 1024 1024))

Then opening dart files like lib/main.dart will cause the issue

Version

[LSP Dart] 1.24.3 at 2025.01.05 @ Emacs 29.4
[Dart SDK] Dart SDK version: 3.6.0 (stable) (Thu Dec 5 07:46:24 2024 -0800) on "macos_arm64"

[Flutter SDK] /opt/flutter/
[Flutter project] true
[Project entrypoint] /path/to/flutter/test_project/lib/main.dart