Merged in bugfix/PMCORE-2704 (pull request #7734)

PMCORE-2704

Approved-by: Julio Cesar Laura Avendaño <contact@julio-laura.com>

workflow/engine/src/ProcessMaker/Util/helpers.php

@@ -620,6 +620,8 @@ function applyMaskDateEnvironment(string $date, $mask = '')
     if (!empty($date)) {
         $date = new DateTime($date);
         $result = $date->format($mask);
+    } else {
+        $result = $date;
     }
 
     return $result;