Expected value but found invalid token at character 1

[gammons]

Hi there, I am trying to use CopilotChat.nvim. I think maybe the main difference is I am using packer.nvim as my package manager. I am installing Copilot chat like so:

  use {
    'CopilotC-Nvim/CopilotChat.nvim',
    branch = 'canary',
    requires = {
      'github/copilot.vim',
      'nvim-lua/plenary.nvim',
    }
  }

-- copilot chat
require("CopilotChat").setup({
   debug = true,
})

Then I run PackerSync and it looks like CopilotChat is installed correctly. (PackerSync is also making sure that all other libraries / dependencies are up-to-date as well)

Here is the output of checkhealth CopilotChat:

CopilotChat: require("CopilotChat.health").check()

CopilotChat.nvim [core] ~
- OK nvim: NVIM v0.10.1
  Build type: Release
  LuaJIT 2.1.1725453128
  Run ":verbose version" for more info

CopilotChat.nvim [commands] ~
- OK curl: curl 8.9.1 (x86_64-pc-linux-gnu) libcurl/8.9.1 OpenSSL/3.3.2 zlib/1.3.1 brotli/1.1.0 zstd/1.5.6 libidn2/2.3.7 libpsl/0.21.5 libssh2/1.11.0 nghttp2/1.63.0 nghttp3/1.5.0
  Release-Date: 2024-07-31
  Protocols: dict file ftp ftps gopher gophers http https imap imaps ipfs ipns mqtt pop3 pop3s rtsp scp sftp smb smbs smtp smtps telnet tftp
  Features: alt-svc AsynchDNS brotli GSS-API HSTS HTTP2 HTTP3 HTTPS-proxy IDN IPv6 Kerberos Largefile libz NTLM PSL SPNEGO SSL threadsafe TLS-SRP UnixSockets zstd
- OK git: git version 2.46.0

CopilotChat.nvim [dependencies] ~
- OK plenary: installed
- OK copilot: copilot.vim
- WARNING tiktoken_core: missing, optional for token counting. See README for installation instructions.
- OK treesitter[markdown]: installed
- OK treesitter[diff]: installed

However, if I try to enter a prompt into the window, or if I run CopilotChatExplain, I am getting the following error:

[CopilotChat.nvim] "Expected value but found invalid token at character 1

Any help to debug would be greatly appreciated. Thanks!