WooCommerce Product Panel crashed & Product Search Bar doesn't work

Hi,

simple problem – my WooCommerce Product Panel crashed few days ago. I installed a plugin called “predictive search” (whereas I don’t think this is responsible for that)
See the following picture for visualization: http://666kb.com/i/dd8tiji0jm3ye81kw.jpg

I tried reinstalling Enfold, switching to Twenty Sixteen and disabling all plugins (except for WooCommerce of course), as well as putting the WooCommerce folder on ftp to a previous state. Nothing worked. And only the Product Panel is hit, everything else works just fine. Any ideas?

Plus: My product search doesn’t work, everytime there is this “No product found” page, which is impossible, because these products exist. Please help :)

Thanks,
Patrick