Hey Matt, I am having the same issue with the Beaver Builder theme and plugin. The moment I activate the Placester plugin I get the following error:
Warning: require_once(PLS_FUNCTIONS_DIR/core.php): failed to open stream: No such file or directory in /home/webdomain/public_html/wp-content/plugins/placester/blueprint/blueprint.php on line 384
Fatal error: require_once(): Failed opening required ‘PLS_FUNCTIONS_DIR/core.php’ (include_path=’.:/usr/lib/php:/usr/local/lib/php’) in /home/webdomain/public_html/wp-content/plugins/placester/blueprint/blueprint.php on line 384