In all my htmlComponents in all my sites, the code just disappeared from the htmlComponents on the editor (it shows 404), however it works well on live sites.
That's odd.
Wix Team, for your investigation
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Working now.
https://support.wix.com/en/article/17-november-2019-html-element-shows-404-error
samesies. Probably a cross-site issue with static.filesusr.com/html.
That's the domain throwing the 404.