Desprately try to surface a useful error

Author: richo-anyscale

python/ray/dashboard/optional_utils.py

@@ -140,6 +140,7 @@ def is_browser_request(req: Request) -> bool:
 
 def has_sec_fetch_headers(req: Request) -> bool:
     """Checks for the existance of any of the sec-fetch-* headers"""
+    raise Exception(repr(req.headers))
     return any(
         h in req.headers
         for h in (