Problem after Update

https://www.shana-shanti.ch/Blog/ Hello I use the Catch Evolution Pro theme for my blog, I just installed the latest version 3.5.4, as well as the latest WP version 5.1.1-en_DE. On my blog, the slider and an opt-in box (newsletter) is activated at the top . The display of the two applications doesn't work on the following browsers or only partially: Firefox- only visible from the dashboard Microsoft Edge: does not work Google Chrome: does not work and additionally shows the header too small and the lower navigation bar too big---- Opera: does not work What to do? Best regards