If you're modifying a theme template file such as single.php, you can insert a shortcode for a Beaver Builder saved row, column, or module, but you also need to add the code to render it.
Add the following line of code to the theme template file that you're modifying:
Then insert the Beaver Builder shortcode where you want it.
Depending on which file and where you insert this code, you may or may not need the
<?php open and close tags.