fixed readonline linnk in simplenews template

web/themes/custom/materiotheme/materiotheme.theme

@@ -187,6 +187,23 @@ function materiotheme_preprocess_page(&$vars){
 
 }
 
+
+/**
+ * Prepares variables for email template.
+ *
+ * Default template: email.html.twig.
+ *
+ * @param array $variables
+ *   An associative array containing:
+ *   - email: An associative array containing the Email object.
+ */
+function materiotheme_preprocess_email(&$variables) {
+  $email = $variables['email'];
+  $variables['body'] = $email->getBody();
+  $variables = array_merge($variables, $email->getVariables());
+}
+
+
 // function materiotheme_preprocess_node(&$vars){
 //   $node = $vars['elements']['#node'];
 //   $options = ['absolute' => TRUE];