Social media buttons not working

It may not be you. LinkedIn has officially deprecated the counting of shares of a piece of content.

Read the post by LinkedIn:
https://developer.linkedin.com/blog/posts/2018/deprecating-the-inshare-counter

If you still see similar “counters” of LinkedIn shares, they could be cached by the website you’re accessing or still held in your browser’s cache.

You can inspect and test the count directly from the LinkedIn API here (using Google as an example):
https://www.linkedin.com/countserv/count/share?url=https://www.google.com/&format=json