Hello,
We updated WordPress, theme and bundled plugins. Some of the third-party plugins that you use generate the warnings, for example, https://gyazo.com/b2d9deb0f7968c09b276dbc443c408e0
So, contact their support and ask to fix that. I disabled that plugin till you fix the problem.
Also, I can’t enable Germanized für WooCommerce. That’s why contact plugin author to get help with that.
Check everything else and let me know if you want to change anything.
Regards