Some error messages from ebook-convert when running recipe

[njpig]

Hi,

What do these error messages mean? Do I need care about them?
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1% Generating masthead...
Synthesizing mastheadImage
2022-03-15 15:28:23.635 ebook-convert[3780:99232] XType: failed to connect - Error Domain=NSCocoaErrorDomain Code=4099 "The connection to service named com.apple.fonts was invalidated: failed at lookup with error 3 - No such process." UserInfo={NSDebugDescription=The connection to service named com.apple.fonts was invalidated: failed at lookup with error 3 - No such process.}
2022-03-15 15:28:23.635 ebook-convert[3780:99232] Font server protocol version mismatch (expected:5 got:0), falling back to local fonts
2022-03-15 15:28:23.635 ebook-convert[3780:99232] XType: unable to make a connection to the font daemon!
2022-03-15 15:28:23.635 ebook-convert[3780:99232] XType: XTFontStaticRegistry is enabled as fontd is not available.
qt.qpa.fonts: Populating font family aliases took 348 ms. Replace uses of missing font family "Liberation Serif" with one that exists to avoid this cost.
1% Starting download in a single thread...

[kovidgoyal]

It means you are running ebook-convert in a context where it cannot connect to apple's font service. Which means anything that requires fonts, such as fenerated covers/masthead images or PDF output will not work properly

[njpig]

Originally Posted by kovidgoyal

It means you are running ebook-convert in a context where it cannot connect to apple's font service. Which means anything that requires fonts, such as fenerated covers/masthead images or PDF output will not work properly

It's weird.

When the recipe was run via the command ebook-convert on the terminal of MacOS(v12.2.1), there were not these error messages appeared.

However, when the recipe was run via ebook-covert by schedule task(i.e. created plist file under /Library/LaunchDaemons/), these error messages were always there.