Whitescreen after transferring WP Page with Duplicator

Hey,

I transferred the above Website/Shop with the Duplicator and the following confusing thing happens:

As soon as I log into the WP admin-area the Website only shows a white screen on all other browsers/computers except the one I used to log in. The only other shown thing is the favicon.
This only happens AFTER I login.

The website is build (by someone else) using several plug-ins (UX Builder, Elementor). The licence-key of Elementor is expired, in case this matters.

I would be very appreciative of any help!

Thank you,
Anna

• This topic was modified 3 days, 7 hours ago by annam92.

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