Error in Youtube-View

(I moved this here from flexicontent.org/forum/20-general-suppor....html?start=20#76692 )

Hi there,

I suddenly get an error (DOM says css-.fancybox-error) saying
"The requested content cannot be loaded. Please try again later."
in an image-gallery-field that displays a youtube-video.
Everything did work until yesterday, not sure what change exactly broke it.

[Details]
My field is set to display multiple values (images and videos are mixed).
The youtube-URLs are correct.
My website is secured via htpasswd.
I tried different gallery-options from the FC-field-config without success.

[More Details]
see attached screenshot:

[Setup]
Joomla! 3.9.6
FC 3.3.1.6-hotfix
After reading this thread, I re-installed the mentioned hotfix via URL without success.

Hello

During page loading,
do you get a CORS error (Cross-origin resource sharing) in the browser console (click F12 to open it)
?

You may post a link private or public

>> do you get a CORS error [...]?
No, not that I see.

Sent you a pm. Thanks for having a look.

Hello

please use
"Install via URL" in Joomla installer to install

github.com/FLEXIcontent/flexicontent-cck/archive/3.3.1.x.zip

Then refresh frontend view and retry

nope, unfortunately I can't spot any difference.

(I installed via url, cleared browser-cache, cleared server-cache, re-entered item-data, refreshed frontend.)

Hello

you may post a private or public link
to see the actual page