diff --git a/webapp/sources/rudder/rudder-core/src/main/scala/com/normation/rudder/services/nodes/PropertyEngineService.scala b/webapp/sources/rudder/rudder-core/src/main/scala/com/normation/rudder/services/nodes/PropertyEngineService.scala
index 1a7cda59fe7..ca1379183d5 100644
--- a/webapp/sources/rudder/rudder-core/src/main/scala/com/normation/rudder/services/nodes/PropertyEngineService.scala
+++ b/webapp/sources/rudder/rudder-core/src/main/scala/com/normation/rudder/services/nodes/PropertyEngineService.scala
@@ -97,8 +97,9 @@ object SecretVariableEngine extends RudderPropertyEngine {
       content <- IOResult.effect(s"File ${secretsFile.pathAsString} not found. Please make sure `secret-management` plugin is installed") {
                    secretsFile.contentAsString(StandardCharsets.UTF_8)
                  }
-      json    <- IOResult.effect(JsonParser.parse(content)).chainError("tr")
-      secrets <- IOResult.effect((json \ "secrets").extract[List[Secret]]).chainError("fr")
+      json    <- IOResult.effect(JsonParser.parse(content)).chainError(s"Parsing JSON in $secretsFile have failed")
+      secrets <- IOResult.effect((json \ "secrets").extract[List[Secret]])
+                   .chainError(s"Unable to find parameter `secrets` in $secretsFile. Verify that the file is well formatted")
 
     } yield {
       secrets.find(_.name == namespace.head) match {