diff --git a/src/DIRAC/FrameworkSystem/Service/TokenManagerHandler.py b/src/DIRAC/FrameworkSystem/Service/TokenManagerHandler.py
index ff81f3be20a..2bcd6535671 100644
--- a/src/DIRAC/FrameworkSystem/Service/TokenManagerHandler.py
+++ b/src/DIRAC/FrameworkSystem/Service/TokenManagerHandler.py
@@ -219,6 +219,9 @@ def export_getToken(
 
             # Get the client token with requested scope and audience
             result = idpObj.fetchToken(grant_type="client_credentials", scope=scope, audience=audience)
+            # DEncode can not encode OAuth2Token object
+            if result["OK"]:
+                result["Value"] = dict(result["Value"])
 
             return result