It seems you are trying to click on either a div or an a tag. However, it looks like you are missing the tag of the id in your xpath, so maybe change the xpath to below. The missing tag could be a artifact of pasting into this forum. In that case, start your single line xpaths with a “back quote” (also called an acute; it’s along with the tilde key) to preserve the content.
//*[@id="bt-content"]/div[1]/div[2]/div/nav/ul/li[4]/div/div[2]/div/a
or
id("bt-content")/div[1]/div[2]/div/nav/ul/li[4]/div/div[2]/div/a
My concern with both of these xpaths is the “distance” you are away from the actual element. That path can break easily with a changing build. As @anuradha says, some HTML is better if you want us to assist you more. (Try a Right click on web page and select “Inspect”)