diff --git a/frigate/http.py b/frigate/http.py
index 4ae4d4d95..a5c2b7439 100644
--- a/frigate/http.py
+++ b/frigate/http.py
@@ -183,6 +183,15 @@ def send_to_plus(id):
         message = f"Event {id} not found"
         logger.error(message)
         return make_response(jsonify({"success": False, "message": message}), 404)
+        
+    if event.end_time is None:
+        logger.error(f"Unable to load clean snapshot for in-progress event: {event.id}")
+        return make_response(
+            jsonify(
+                {"success": False, "message": "Unable to load clean png for in-progress event"}
+            ),
+            400,
+        )
 
     if event.plus_id:
         message = "Already submitted to plus"
@@ -201,6 +210,15 @@ def send_to_plus(id):
             ),
             400,
         )
+        
+    if image is None or image.size == 0:
+        logger.error(f"Unable to load clean png for event: {event.id}")
+        return make_response(
+            jsonify(
+                {"success": False, "message": "Unable to load clean png for event"}
+            ),
+            400,
+        )
 
     try:
         plus_id = current_app.plus_api.upload_image(image, event.camera)