Broken header-slider in Sydney

On http://spiegelbilder.de the header-slider images do not appear anymore for at least some weeks.
Must have been some of the recent updates of sydney since i haven’t make any changes to the content for about a year.
Already tried re-enabling the theme and removing my custom css, unfortunately with no effect.
Same on my beta-site http://fosternet.de.
Is the slider itself broken?

BR

Hi BR,

Have you check the header settings in Customizer and found something missing in there? Perhaps you’d need to switch temporarily to other header type, save, and switch back to header slider, and save.

Regards,
Kharis
aThemes Support

Thank you Kharis, i should have tried that before asking as well.
I don’t know why an update of the theme resetted the slider settings or if a wordpress update somehow caused it.
I’m gonna look on my sites after each single update in the future.
Again, trhank you for the hint.
BR

You’re welcome!

Please let us know in a new topic if you have any further questions, or if we can provide you with any other assistance.

Regards,
Kharis
aThemes Support