Update $base_url parameter since the block location changed.

platforms/php/build.php

@@ -71,8 +71,8 @@ class Component_Builder {
 		$this->register_default_handlebar_helpers();
 
 		$this->add_handlebar( 'base_url', function ( $context ) {
-			$path = join( '/', [ 'blocks', $this->block_project, $this->block_name, 'templates' ] );
-			return plugins_url( $path . '/', 'axeweb-blocks-library/axeweb-blocks-library.php' );
+			$path = join( '/', [ $this->block_project, $this->block_name, 'templates' ] );
+            return join( '/', [ get_site_url(),'wp-content', 'axe-web-blocks', $path, '' ] );
 		} );
 	}