How to add a “Read more” button to my blog?

You can make a basic link to the current post within the loop with

<a href="https://wordpress.stackexchange.com/questions/233036/<?php the_permalink(); ?>">Read More</a>

Hata!: SQLSTATE[HY000] [1045] Access denied for user 'divattrend_liink'@'localhost' (using password: YES)