fix type cast

lib/src/unit/ViewEngine.ts

@@ -187,7 +187,7 @@ export default class ViewEngine extends LifecycleUnit {
                 // Generate the partial name.
                 // This is done by taking the relative path from the partials dir, removing the suffix,
                 // and replacing directory separators with the standard : identifier.
-                let partial_name = entry.path.replace(partials_path, '').slice(0, -1 * (this.get_file_extension()).length)
+                let partial_name = entry.path.replace(partials_path.to_local, '').slice(0, -1 * (this.get_file_extension()).length)
                 if ( partial_name.startsWith('/') ) partial_name = partial_name.slice(1)
                 partial_name = partial_name.replace(/\//g, ':')