Hi @mzelst
Thanks for the information.
If the slider is not working before the update, it is clear that the issue is not related to the ACF plugin.
Your slider is part of your theme, which relies on javascript and HTML to operate.
I think you will need to hire a web developer to do some debugging on your site and find out why the slider is not working.
This will be the most effective way to solve your issue and get your website working again.
