File mode specification error: (void-variable lsp-csharp--action-client-find-references)

I'm using doom emacs.

my ~/.doom.d/config.el is -

(use-package! lsp-mode
:hook
(haskell-mode . lsp)
:commands
lsp)

(use-package! lsp-ui
:commands
lsp-ui-mode)

(use-package! lsp-haskell
:after haskell-mode
:config
(setq lsp-haskell-process-path-hie "ghcide")
(setq lsp-haskell-process-args-hie '())
(add-hook 'haskell-mode-hook #'lsp)
)


(use-package! haskell-mode
:mode "\\.hs$"
:config
(rainbow-delimiters-mode)
;; (setq haskell-font-lock-symbols t)
;;(add-to-list ("<>" . "⊕"))
(setq haskell-font-lock-symbols-alist
        (-reject
        (lambda (elem)
        (or))
        haskell-font-lock-symbols-alist)))

whenever i open haskell file i get error File mode specification error: (void-variable lsp-csharp--action-client-find-references) -

OS details -

$ lsb_release -a
LSB Version:    :core-4.1-amd64:core-4.1-noarch
Distributor ID: Fedora
Description:    Fedora release 32 (Thirty Two)
Release:        32
Codename:       ThirtyTwo

emacs details -

$ emacs -version
GNU Emacs 27.1

How can I solve this issue?