diff --git a/litellm/llms/vertex_ai/gemini/vertex_and_google_ai_studio_gemini.py b/litellm/llms/vertex_ai/gemini/vertex_and_google_ai_studio_gemini.py
index 818dc8d45f0..ff50a526b0f 100644
--- a/litellm/llms/vertex_ai/gemini/vertex_and_google_ai_studio_gemini.py
+++ b/litellm/llms/vertex_ai/gemini/vertex_and_google_ai_studio_gemini.py
@@ -1543,7 +1543,7 @@ class VertexGeminiConfig(VertexAIBaseConfig, BaseConfig):
             if "text" in part:
                 text_content = part["text"]
                 # Check if text content contains audio data URI
-                if text_content.startswith("data:audio") and ";base64," in text_content:
+                if text_content is not None and text_content.startswith("data:audio") and ";base64," in text_content:
                     try:
                         if is_base64_encoded(text_content):
                             media_type, audio_data = text_content.split("data:")[1].split(";base64,")
diff --git a/litellm/proxy/guardrails/guardrail_hooks/bias_hallucination_estimator/__init__.py b/litellm/proxy/guardrails/guardrail_hooks/bias_hallucination_estimator/__init__.py
index 298ed6b7b56..8473cb97591 100644
--- a/litellm/proxy/guardrails/guardrail_hooks/bias_hallucination_estimator/__init__.py
+++ b/litellm/proxy/guardrails/guardrail_hooks/bias_hallucination_estimator/__init__.py
@@ -46,6 +46,11 @@ def initialize_guardrail(
             ),
             session=GuardrailSessionConfig(
                 violation_message_template=getattr(litellm_params, "violation_message_template", None),
+                mask_request_content=getattr(litellm_params, "mask_request_content", False),
+                mask_response_content=getattr(litellm_params, "mask_response_content", False),
+                end_session_after_n_fails=getattr(litellm_params, "end_session_after_n_fails", None),
+                on_violation=getattr(litellm_params, "on_violation", None),
+                realtime_violation_message=getattr(litellm_params, "realtime_violation_message", None),
             ),
         ),
     )