If you have troubles since the update to WordPress 4.5 please read this post before opening a new thread.
Tagged: Links not working
There could be a plugin interfering with the basic wordpress functions. If you have any active, disable them and see if that helps.
Additionally, you can go to the Text tab (while editing a post/page) and put the in link as raw html. It would be like this:
<a href="http://google.com">My Link to Google</a>
The topic ‘Simple link question that is driving me crazy’ is closed to new replies.