Update error_msg

radiobee/error_msg.py

@@ -8,7 +8,7 @@ import pandas as pd
 def error_msg(
     msg: Optional[Union[str, Exception]],
     title: str = "error message",
-) -> Tuple[Union[pd.DataFrame, None], None, None, None, None, None, None]:
+) -> Tuple[str, None], None, None, None, None, None, None]:
     """Prepare an error message for gradiobee outputs."""
     if msg is None:
         msg = "none..."
@@ -22,4 +22,4 @@ def error_msg(
 
     # return df, *((None,) * 4)  # pyright complains
     # return df, None, None, None, None, None, None, None
-    return df, None, None, None, None, None, None
+    return df.to_html(), None, None, None, None, None, None