The correct way to insert URL into a Gmail email is as follows:
<p><a href="http://www.nolink.com">click here</a></p>
The result in the email will then look like this:
When creating the link, the HTML differs depending on which page you look at, and some syntax is just not working correctly with Gmail.
The Make team recommends using the following page to create your HTML codes: https://wordtohtml.net/. The reason is simple - it works really well with Gmail 
Helpful Links:
Gmail on Make