ElixirLS stopped working: "Unable to find formatter"

Questions / Help
21

I need to improve the experience on that front. The build can fail for hundreds of reasons and asking the user to run mix deps.get on every failure would be misleading

1 Like
22

I was getting the “Unable to find formatter” error in an umbrella app (auction_umbrella in “Elixir in Action 1.4”), but I really didn’t care if my code was formatted according to some spec. However, when I opened a terminal window in vscode, that blasted error message would popup and cover the output in the terminal window–now the formatter error was a problem! I searched around trying to find a solution–without any success, and finally I just unnistalled ElixirLS in vscode, quit vscode, relaunched vscode, and reinstalled ElixirLS in vscode, and now the error is gone. We’ll see if that remains the case.

2 Likes
23

Just adding in I had this for weeks on latest version of ElixirLS (0.23.1). Elixir 1.17.2, OTP 27. Tried installing older versions, uninstalling, reinstalling. Nothing worked. Eventually I uninstalled, trashed the .elixir_ls folder, reinstalled an older version and then upgraded Elixir LS and it worked!

3 Likes
24

Do you know which older version you installed? I’ve tried many combinations and nothing works :sob:

2 Likes
25

Same error here :

Unable to find formatter for /Users/goulvenclech/Documents/encheres_immo/lib/encheres_immo_web/components/form/combobox.ex: "** (Mix.Error) Formatter plugin Surface.Formatter.Plugin cannot be found    
(mix 1.17.2) lib/mix.ex:588: Mix.raise/2    
(language_server 0.23.0) lib/language_server/mix_tasks/format.ex:302: anonymous fn/2 in Mix.Tasks.ElixirLSFormat.load_plugins/1    
(elixir 1.17.2) lib/enum.ex:2531: Enum.\"-reduce/3-lists^foldl/2-0-\"/3    
(language_server 0.23.0) lib/language_server/mix_tasks/format.ex:299: Mix.Tasks.ElixirLSFormat.load_plugins/1    
(language_server 0.23.0) lib/language_server/mix_tasks/format.ex:362: Mix.Tasks.ElixirLSFormat.formatter_for_file/2    
(language_server 0.23.0) lib/language_server/source_file.ex:277: ElixirLS.LanguageServer.SourceFile.formatter_for/3    
(language_server 0.23.0) lib/language_server/providers/formatting.ex:13: ElixirLS.LanguageServer.Providers.Formatting.format/4\n    (language_server 0.23.0) lib/language_server/server.ex:1280: anonymous fn/3 in ElixirLS.LanguageServer.Server.handle_request_async/2"

Erlang/OTP 26
Elixir 1.17.2
ElixirLS plugin v0.23.1
ElixirLS v0.23.0
VScode 1.92.2 (Universal)
MacOS 14.5 (23F79)

Fixed by following @cgraham tips and restarting VScode.

1 Like
26

0.20.0 worked for me.

1 Like
27

Thank you. I’m not sure what happened, I had given up and didn’t do anything else, but at some point the formatter started working again. So it looks like the procedure worked, but maybe it took a while for the tools/cache to build in the background so I didn’t detect it working :thinking:

Thanks to all

2 Likes