how is eglot-server-initialized-hook used?

[iambumblehead]

when the below is added to my emacs config, an error message appears in the *Messages* buffer,

emacs.el

(add-hook 'eglot-server-initialized-hook (lambda () (mmm-parse-buffer)))

*Messages* some indentation added by me

Error in post-command-hook (#[0 "\303\304\301\242\305#\210\300\306�!\205��r\211q\210
?\205��\307\310\311 \")\207" [#<buffer btnIcHashtag.js> (#0) eglot--managed-mode
           remove-hook post-command-hook nil buffer-live-p apply eglot--connect eglot--guess-contact] 4]):
           (wrong-number-of-arguments (lambda nil (mmm-parse-buffer)) 1)

I'm using eglot with mmm-mode and web-mode to syntax-highlight an embedded template. mmm-mode does not begin highlighting the region until mmm-parse-buffer is called. More information about my situation is here

[iambumblehead]

the hook-function must include a parameter and then the error goes away. This is working for me, below.
emacs.el

(add-hook 'eglot-server-initialized-hook (lambda (server) (run-at-time 1 nil (lambda() (mmm-parse-buffer)))))