Feature-rich editor demo not displaying in Safari

[CharlesBelov]

📝 Provide detailed reproduction steps (if any)

1. Launch Safari
2. Go to Feature-rich demo

✔️ Expected result

Feature-rich demo appears between "This demo showcases many of CKEditor’s features, alongside a selection of premium addons: CKBox, Export to PDF/Word, Import from Word, and WProofreader." and the note.

❌ Actual result

Large blank area appears between "This demo showcases many of CKEditor’s features, alongside a selection of premium addons: CKBox, Export to PDF/Word, Import from Word, and WProofreader." and the note.

JavaScript console reveals the following:

[Info] Successfully preconnected to https://api.ckbox.io/
[Info] Successfully preconnected to https://dev.visualwebsiteoptimizer.com/
[Info] Successfully preconnected to https://fonts.gstatic.com/
[Info] Successfully preconnected to https://cdn.ckbox.io/
[Error] Unhandled Promise Rejection: NotAllowedError: The request is not allowed by the user agent or the platform in the current context, possibly because the user denied permission.
play
jT (ck-demo-external-feature-rich-53e9267921.js:10308:1366)
(anonymous function) (ck-demo-external-feature-rich-53e9267921.js:10308:1216)
Global Code (ck-demo-external-feature-rich-53e9267921.js:10308:2183)
[Warning] The resource https://cdn.ckbox.io/CKBox/latest/ckbox.js was preloaded using link preload but not used within a few seconds from the window's load event. Please make sure it wasn't preloaded for nothing.
[Log] WebSights Script Loaded! (zi-tag.js, line 1)

📃 Other details

• Browser: Safari Version 17.5 (19618.2.12.11.6)
• OS: macOS Sonoma 14.5
• First affected CKEditor version: Unknown
• Installed CKEditor plugins: Whatever is on Feature-rich demo

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[Reinmar]

Hi! Huge thanks for reporting this.

We couldn't initially reproduce this (and this is why we missed it) but it turns out that it can be caused by disabling autoplay in Safari.

We're working on the fix now.

I'll close the ticket because it'll be handled in another repository.