Hello, Lorena!
Here is a solution:
Go to:
Customizing ▸ Layout▸Layout Sidebar
and change the sidebar position from “left” to “Right”.
then your site should work normally.
https://prnt.sc/gtnb7s
If this solution doesn’t work, please give us your admin user/pass in private reply, so we can check what’s going on, directly on your site.
Best Regards