diff --git a/webui/Main.py b/webui/Main.py
index 1a327f7..5b8716a 100644
--- a/webui/Main.py
+++ b/webui/Main.py
@@ -223,7 +223,7 @@ left_panel = panel[0]
 middle_panel = panel[1]
 right_panel = panel[2]
 
-params = VideoParams()
+params = VideoParams(video_subject="")
 
 with left_panel:
     with st.container(border=True):
@@ -299,7 +299,8 @@ with middle_panel:
                                           index=0)
     with st.container(border=True):
         st.write(tr("Audio Settings"))
-        voices = voice.get_all_azure_voices(filter_locals=["zh-CN", "zh-HK", "zh-TW", "de-DE", "en-US", "fr-FR", "vi-VN"])
+        voices = voice.get_all_azure_voices(
+            filter_locals=["zh-CN", "zh-HK", "zh-TW", "de-DE", "en-US", "fr-FR", "vi-VN"])
         friendly_names = {
             v: v.
             replace("Female", tr("Female")).