diff --git a/package_tracking/http.py b/package_tracking/http.py
index 7611cc4..73d2ec5 100644
--- a/package_tracking/http.py
+++ b/package_tracking/http.py
@@ -1,5 +1,6 @@
 import bottle
 
+import datetime
 from . import database, parcelsapp
 
 PARCELSAPP_CLIENT: parcelsapp.ParcelsAppClient | None = None
@@ -57,6 +58,10 @@ a {
     background: #AEABFB;
 }
 
+.tracking-item.unknown {
+    background: red;
+}
+
 h1 {
     text-align: center;
 }
@@ -98,13 +103,17 @@ footer {
 
 <main>
 
+% if error_message is not None:
+    <div class="error-message">{{error_message}}</div>
+% end
+
 <div class="tracking-grid">
 % for entry, tracking_data in tracking_results:
-    <a target="_blank" href="{{tracking_data.tracking_url}}">
-    <div class="tracking-item {{tracking_data.status}}">
+    <a target="_blank" href="{{tracking_data.tracking_url if tracking_data else ''}}">
+    <div class="tracking-item {{tracking_data.status if tracking_data else 'unknown'}}">
         <div class="tracking-name" title="{{entry.number}}"><span class="tracking-name-inner">{{ entry.name }}</span></div>
-        <div class="tracking-status">{{ tracking_data.latest_state().status }}</div>
-        <div class="tracking-update-date">{{ tracking_data.latest_state().date.date() }}</div>
+        <div class="tracking-status">{{ tracking_data.latest_state().status if tracking_data else 'unknown' }}</div>
+        <div class="tracking-update-date">{{ tracking_data.latest_state().date.date() if tracking_data else '???' }}</div>
     </div>
     </a>
 % end
@@ -131,21 +140,27 @@ footer {
 </html>
 """
 
+TODAY = datetime.datetime.now(tz=datetime.UTC).date()
 
 def render_tracking(with_form: bool):
     tracking_entries = database.get_tracking_numbers()
     tracking_numbers = [e.number for e in tracking_entries]
 
-    tracking_results = PARCELSAPP_CLIENT.get_tracking_status(tracking_numbers)
+    try:
+        tracking_results = list(PARCELSAPP_CLIENT.get_tracking_status(tracking_numbers))
+        error_message = None
+    except parcelsapp.ParcelsApiError as ex:
+        tracking_results = []
+        error_message = str(ex)
 
     tracking_results_by_id = {
         result.tracking_number: result for result in tracking_results
     }
 
     tracking_results_with_name = [(e, tracking_results_by_id.get(e.number)) for e in tracking_entries]
-    tracking_results_with_name.sort(key=lambda x: x[1].latest_state().date, reverse=True)
+    tracking_results_with_name.sort(key=lambda x: x[1].latest_state().date if x[1] else TODAY, reverse=True)
 
-    return bottle.template(TEMPLATE, tracking_results=tracking_results_with_name, with_form=with_form)
+    return bottle.template(TEMPLATE, error_message=error_message, tracking_results=tracking_results_with_name, with_form=with_form)
 
 @bottle.route('/')
 def index():
diff --git a/package_tracking/parcelsapp.py b/package_tracking/parcelsapp.py
index 9f0628b..a55c8cf 100644
--- a/package_tracking/parcelsapp.py
+++ b/package_tracking/parcelsapp.py
@@ -35,6 +35,8 @@ class ParcelInfo:
     def latest_state(self) -> ParcelState:
         return max(self.states, key=lambda state: state.date)
 
+class ParcelsApiError(RuntimeError):
+    pass
 
 class ParcelsAppClient:
     def __init__(self, api_key: str):
@@ -50,7 +52,7 @@ class ParcelsAppClient:
         json_data = response.json()
         if 'error' in json_data:
             msg = 'Error from endpoint: {}'.format(json_data['error'])
-            raise RuntimeError(msg)
+            raise ParcelsApiError(msg)
         return json_data
 
     def check_tracking_status(self, uuid: str) -> dict: