Ted Bowman · Adam G-H
--- a/src/Form/UpdaterForm.php
+++ b/src/Form/UpdaterForm.php
-    // Re-running the readiness checks now should mean that when we display
-    // cached errors in automatic_updates_page_top(), we'll see errors that
-    // were raised during this run, instead of any previously cached results.
-    $errors = $this->readinessValidationManager->run()
-      ->getResults(SystemManager::REQUIREMENT_ERROR);
-
-    if (empty($errors)) {
+    $results = $this->getReadinessErrors($recommended_release->getVersion());
+    if (empty($results)) {
      $form['actions'] = $this->actions($form_state);
    }
+    else {
+      $this->messenger()->addError($this->getFailureMessageForSeverity(SystemManager::REQUIREMENT_ERROR));
+      foreach ($results as $result) {
+        $messages = $result->getMessages();
+        $message = count($messages) === 1 ? $messages[0] : $result->getSummary();