diff --git a/lib/client/client.py b/lib/client/client.py
index c672c31..ae1e9c0 100644
--- a/lib/client/client.py
+++ b/lib/client/client.py
@@ -40,6 +40,8 @@ def available_servers():
 
 class ZordonClient:
 
+    default_image = Image.open("../server/static/images/desktop.png")
+
     def __init__(self):
 
         servers = available_servers()
@@ -56,6 +58,7 @@ class ZordonClient:
         photo_pad.pack(fill=tk.BOTH, pady=5, padx=5)
         self.photo_label = tk.Label(photo_pad, height=500)
         self.photo_label.pack(fill=tk.BOTH, expand=True)
+        self.set_image(self.default_image)
 
         server_frame = tk.LabelFrame(self.root, text="Server")
         server_frame.pack(fill=tk.BOTH, pady=5, padx=5, expand=True)
@@ -117,12 +120,15 @@ class ZordonClient:
         self.root.minsize(width=900, height=1000)
         make_sortable(self.job_tree)
 
+        # update jobs
         self.update_jobs()
         try:
             selected_job = self.job_tree.get_children()[0]
             self.job_tree.selection_set(selected_job)
         except IndexError:
             pass
+
+        # update servers
         self.populate_server_tree()
         try:
             selected_server = self.server_tree.get_children()[0]
@@ -160,6 +166,12 @@ class ZordonClient:
             self.server_proxy.request_data(f'job/{job_id}/delete?confirm=true')
             self.update_jobs(clear_table=True)
 
+    def set_image(self, image):
+        thumb_image = ImageTk.PhotoImage(image)
+        if thumb_image:
+            self.photo_label.configure(image=thumb_image)
+            self.photo_label.image = thumb_image
+
     def on_row_select(self, event):
         if self.job_tree.selection():
             selected_item = self.job_tree.selection()[0]  # Get the selected item
@@ -167,24 +179,22 @@ class ZordonClient:
             job_id = row_data['values'][0]
 
             # update thumb
-            thumb_url = f'http://{self.server_proxy.hostname}:{self.server_proxy.port}/ui/job/{job_id}/thumbnail?size=big'
-            response = requests.get(thumb_url)
-            if response.status_code == 200:
+            response = self.server_proxy.request(f'job/{job_id}/thumbnail?size=big')
+            if response.ok:
                 try:
                     import io
                     image_data = response.content
                     image = Image.open(io.BytesIO(image_data))
-                    thumb_image = ImageTk.PhotoImage(image)
-                    if thumb_image:
-                        self.photo_label.configure(image=thumb_image)
-                        self.photo_label.image = thumb_image
+                    self.set_image(image)
                 except Exception as e:
                     print(f"error getting image: {e}")
 
             # update button status
             job = next((d for d in self.job_cache if d.get('id') == job_id), None)
-            button_state = 'normal' if job['status'] == 'running' else 'disabled'
+            button_state = 'normal' if job and job['status'] == 'running' else 'disabled'
             self.stop_button.config(state=button_state)
+        else:
+            self.set_image(self.default_image)
 
     def reveal_in_finder(self):
         selected_item = self.job_tree.selection()[0]  # Get the selected item
diff --git a/lib/client/server_proxy.py b/lib/client/server_proxy.py
index 91fc3c5..92a226a 100644
--- a/lib/client/server_proxy.py
+++ b/lib/client/server_proxy.py
@@ -24,13 +24,16 @@ class RenderServerProxy:
 
     def request_data(self, payload, timeout=5):
         try:
-            req = requests.get(f'http://{self.hostname}:{self.port}/api/{payload}', timeout=timeout)
+            req = self.request(payload, timeout)
             if req.ok:
                 return req.json()
         except Exception as e:
             pass
         return None
 
+    def request(self, payload, timeout=5):
+        return requests.get(f'http://{self.hostname}:{self.port}/api/{payload}', timeout=timeout)
+
     def get_jobs(self):
         all_jobs = self.request_data('jobs')
         sorted_jobs = []
diff --git a/lib/render_workers/base_worker.py b/lib/render_workers/base_worker.py
index fd27b15..fafd773 100644
--- a/lib/render_workers/base_worker.py
+++ b/lib/render_workers/base_worker.py
@@ -42,8 +42,8 @@ class BaseRenderWorker(Base):
     input_path = Column(String)
     output_path = Column(String)
     date_created = Column(DateTime)
-    start_time = Column(DateTime)
-    end_time = Column(DateTime)
+    start_time = Column(DateTime, nullable=True)
+    end_time = Column(DateTime, nullable=True)
     renderer = Column(String)
     renderer_version = Column(String)
     priority = Column(Integer)
diff --git a/lib/server/job_server.py b/lib/server/job_server.py
index 8917d00..178f6f4 100755
--- a/lib/server/job_server.py
+++ b/lib/server/job_server.py
@@ -68,7 +68,7 @@ def job_detail(job_id):
                            job=found_job, renderer_info=renderer_info())
 
 
-@server.route('/ui/job/<job_id>/thumbnail')
+@server.route('/api/job/<job_id>/thumbnail')
 def job_thumbnail(job_id):
     big_thumb = request.args.get('size', False) == "big"
     found_job = RenderQueue.job_with_id(job_id, none_ok=True)
diff --git a/lib/server/static/js/job_table.js b/lib/server/static/js/job_table.js
index f66925d..7d2208a 100644
--- a/lib/server/static/js/job_table.js
+++ b/lib/server/static/js/job_table.js
@@ -2,7 +2,7 @@ const grid = new gridjs.Grid({
 columns: [
   { data: (row) => row.id,
   name: 'Thumbnail',
-  formatter: (cell) => gridjs.html(`<img src="/ui/job/${cell}/thumbnail" style='width: 200px; min-width: 120px;'>`),
+  formatter: (cell) => gridjs.html(`<img src="/api/job/${cell}/thumbnail" style='width: 200px; min-width: 120px;'>`),
   sort: {enabled: false}
   },
   { id: 'name',