diff --git a/lib/core/common.py b/lib/core/common.py
index 756805d87..409a4781b 100644
--- a/lib/core/common.py
+++ b/lib/core/common.py
@@ -3118,9 +3118,15 @@ def decodeHexValue(value):
                 value = value[2:]
             value = value.decode("hex")
             if len(value) > 1 and value[1] == '\x00':
-                value = value.decode("utf-16-le")
+                try:
+                    value = value.decode("utf-16-le")
+                except UnicodeDecodeError:
+                    pass
             elif value and value[0] == '\x00':
-                value = value.decode("utf-16-be")
+                try:
+                    value = value.decode("utf-16-be")
+                except UnicodeDecodeError:
+                    pass
         return value
 
     return applyFunctionRecursively(value, _)
diff --git a/lib/request/inject.py b/lib/request/inject.py
index 3643fe0f5..b99cf9d5b 100644
--- a/lib/request/inject.py
+++ b/lib/request/inject.py
@@ -20,7 +20,6 @@ from lib.core.common import expandAsteriskForColumns
 from lib.core.common import extractExpectedValue
 from lib.core.common import getPublicTypeMembers
 from lib.core.common import initTechnique
-from lib.core.common import isNoneValue
 from lib.core.common import isNumPosStrValue
 from lib.core.common import isTechniqueAvailable
 from lib.core.common import parseUnionPage