I try to use the Customizer for the widgets on my side. But they are completely empty and show the message that the widgets are 13 and on this page not available for customization.
I try to change the Theme to a standard one. My side crash completely and I could only recover them with a database backup. Now, I couldn`t customize something and could change the Theme.
If anybody have a hint to solve that, please let me know.
Thanks
I had the same issue and the support team installed this plugin for me which fixed the issue: https://wordpress.org/plugins/enable-jquery-migrate-helper/ My site content is now visible again!