links not working in sidebar

All links in the sidebar besides the top menu don’t work. This includes a regular paragraph block with a link and social media icons. These work in wordpress edit mode in Widgets, but not on the live site.

I asked a developer and he fixed it by adding the code below in inspector. Is anyone else getting this? Can it be fixed in the original theme code?

.widget a {
position: relative;
}

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