Menu on Mobile appears twice

Hi,

Since the last update the menu on mobile devices appears twice.
See here: https://dam.udiburg.com/
What I found is that (and sorry for the Hebrew screenshots) is that the page I’ve created on “theme panel”>”my library” was not shown on the custom design of OceanWP theme settings.
See here: https://drive.google.com/file/d/1sjvwIMwpvi6rpfPlt5_R2VyYYNpiEeRl/view?usp=sharing
And when I select the pahe I’ve created for the header with the menus, see here:
https://drive.google.com/file/d/1UEXIURJ_5CQAHeGJzEZNqy1GA7LAqKCh/view?usp=sharing
I’m getting error 500 and the site doesn’t load.
Here’s the error:
https://drive.google.com/file/d/1FiAH1ZrkWv4OoKIduA9KMm6IbcyjljKp/view?usp=sharing
How can I fix it?

The page I need help with: [log in to see the link]