diff --git a/main.py b/main.py
index 9594573..6bfd75c 100644
--- a/main.py
+++ b/main.py
@@ -25,6 +25,7 @@ from utilities.constants import VALUE_APP
 from utilities.constants import VALUE_JOB_PENDING
 from utilities.constants import VALUE_JOB_RUNNING
 from utilities.constants import VALUE_JOB_DONE
+from utilities.constants import VALUE_JOB_FAILED
 from utilities.envvar import get_env_var_with_default
 from utilities.envvar import get_env_var
 from utilities.times import wait_for_seconds
@@ -221,9 +222,15 @@ def backend(event_termination):
 
             config = Config().set_config(next_job)
 
-        result_dict = text2img.lunch(
-            prompt=prompt, negative_prompt=negative_prompt, config=config
-        )
+        try:
+            result_dict = text2img.lunch(
+                prompt=prompt, negative_prompt=negative_prompt, config=config
+            )
+        except BaseException as e:
+            logger.error("text2img.lunch error: {}".format(e))
+            local_job_stack.pop(0)
+            next_job[KEY_JOB_STATUS] = VALUE_JOB_FAILED
+            local_completed_jobs.append(next_job)
 
         with memory_lock:
             local_job_stack.pop(0)
diff --git a/templates/index.html b/templates/index.html
index e8bec2a..c5b87b8 100644
--- a/templates/index.html
+++ b/templates/index.html
@@ -69,7 +69,7 @@
                                 <div class="form-row col-md-6">
                                     <label for="inputSteps">Steps</label>
                                     <input type="number" class="form-control" id="inputSteps"
-                                        aria-describedby="inputStepsHelp" placeholder="default is 20">
+                                        aria-describedby="inputStepsHelp" placeholder="default is 50">
                                     <div id="inputStepsHelp" class="form-text">Each step is about 38s (CPU) or 0.1s
                                         (GPU)
                                     </div>
@@ -145,10 +145,12 @@
                         $('#resultStatus').html(response.jobs[0].status)
                         $('#resultSeed').html(response.jobs[0].seed)
                         if (response.jobs[0].status == "done") {
-                            $('#resultStatus').html(response.jobs[0].status);
                             $('#newJobImg').attr('src', response.jobs[0].img);
                             return;
                         }
+                        if (response.jobs[0].status == "failed") {
+                            return;
+                        }
                     }
                     setTimeout(function () { waitForImage(apikeyVal, uuidValue); }, 1000);  // refresh every second
                 },
@@ -189,7 +191,7 @@
                 }
                 var stepsVal = parseInt($('#inputSteps').val());
                 if (isNaN(stepsVal)) {
-                    stepsVal = 20;
+                    stepsVal = 50;
                 }
                 var widthVal = parseInt($('#inputWidth').val());
                 if (isNaN(widthVal)) {
@@ -205,6 +207,16 @@
                     return;
                 }
 
+                if (widthVal % 8 != 0) {
+                    alert("width must be divisible by 8!");
+                    return;
+                }
+
+                if (heightVal % 8 != 0) {
+                    alert("height must be divisible by 8!");
+                    return;
+                }
+
                 // Send POST request using Ajax
                 $.ajax({
                     type: 'POST',
diff --git a/utilities/constants.py b/utilities/constants.py
index 1c39679..ef0512b 100644
--- a/utilities/constants.py
+++ b/utilities/constants.py
@@ -46,6 +46,7 @@ KEY_JOB_STATUS = "status"
 VALUE_JOB_PENDING = "pending"
 VALUE_JOB_RUNNING = "running"
 VALUE_JOB_DONE = "done"
+VALUE_JOB_FAILED = "failed"
 
 REQUIRED_KEYS = [
     API_KEY.lower(),