diff --git a/apps/backend/app/utils/report_template.py b/apps/backend/app/utils/report_template.py
index f3d06e2c..5459598f 100644
--- a/apps/backend/app/utils/report_template.py
+++ b/apps/backend/app/utils/report_template.py
@@ -1,6 +1,18 @@
 def render_report_html(data):
-    params_html = "".join(f"<tr><td>{k}</td><td>{v}</td></tr>" for k, v in data["asl_parameters"])
-    missing_html = "".join(f"<li>{param}</li>" for param in data["missing_parameters"])
+    asl_parameters = data.get("asl_parameters", {})
+    if isinstance(asl_parameters, dict):
+        parameter_items = asl_parameters.items()
+    else:
+        parameter_items = asl_parameters
+
+    missing_parameters = data.get("missing_required_parameters", data.get("missing_parameters", []))
+    if isinstance(missing_parameters, dict):
+        missing_items = missing_parameters.keys()
+    else:
+        missing_items = missing_parameters
+
+    params_html = "".join(f"<tr><td>{k}</td><td>{v}</td></tr>" for k, v in parameter_items)
+    missing_html = "".join(f"<li>{param}</li>" for param in missing_items)
     return f"""
     <html>
     <head>
@@ -18,9 +30,9 @@ def render_report_html(data):
             {params_html}
         </table>
         <h2>Basic Report</h2>
-        <p>{data["basic_report"]}</p>
+        <p>{data.get("basic_report", "No basic report available.")}</p>
         <h2>Extended Report</h2>
-        <p>{data["extended_report"]}</p>
+        <p>{data.get("extended_report", "No extended report available.")}</p>
         <h2>Missing Parameters</h2>
         <ul>
             {missing_html}
diff --git a/apps/backend/tests/test_report.py b/apps/backend/tests/test_report.py
index 2dd19c8f..bea017be 100644
--- a/apps/backend/tests/test_report.py
+++ b/apps/backend/tests/test_report.py
@@ -40,4 +40,16 @@ def test_report_pdf_endpoint():
     }
     response = client.post("/api/report/report-pdf", json=report_data)
     assert response.status_code == 200
+    assert response.headers["content-type"] == "application/pdf"
+
+
+def test_report_pdf_endpoint_uses_missing_required_parameters():
+    report_data = {
+        "report_data": {
+            "asl_parameters": {"param1": "value1"},
+            "missing_required_parameters": {"PostLabelingDelay": "ms"},
+        }
+    }
+    response = client.post("/api/report/report-pdf", json=report_data)
+    assert response.status_code == 200
     assert response.headers["content-type"] == "application/pdf"
\ No newline at end of file
