diff --git a/app/kubernetes/services/configMapService.js b/app/kubernetes/services/configMapService.js
index be863eaeb..b8ebbe38b 100644
--- a/app/kubernetes/services/configMapService.js
+++ b/app/kubernetes/services/configMapService.js
@@ -28,8 +28,19 @@ class KubernetesConfigMapService {
         this.KubernetesConfigMaps(namespace).get(params).$promise,
         this.KubernetesConfigMaps(namespace).getYaml(params).$promise,
       ]);
-      const configMap = KubernetesConfigMapConverter.apiToConfigMap(rawPromise.value, yamlPromise.value);
-      return configMap;
+
+      if (_.get(rawPromise, 'reason.status') == 404 && _.get(yamlPromise, 'reason.status') == 404) {
+        return KubernetesConfigMapConverter.defaultConfigMap(namespace, name);
+      }
+
+      // Saving binary data to 'data' field in configMap Object is not allowed by kubernetes and getYaml() may get 
+      // an error. We should keep binary data to 'binaryData' field instead of 'data'. Before that, we 
+      // use response from get() and ignore 500 error as a workaround.
+      if (rawPromise.value) {
+        return KubernetesConfigMapConverter.apiToConfigMap(rawPromise.value, yamlPromise.value);
+      }
+
+      throw new PortainerError('Unable to retrieve config map ', name);
     } catch (err) {
       if (err.status === 404) {
         return KubernetesConfigMapConverter.defaultConfigMap(namespace, name);
diff --git a/app/portainer/views/stacks/edit/stack.html b/app/portainer/views/stacks/edit/stack.html
index 47856bb78..bdf3f81f7 100644
--- a/app/portainer/views/stacks/edit/stack.html
+++ b/app/portainer/views/stacks/edit/stack.html
@@ -89,7 +89,7 @@
           </uib-tab>
           <!-- !tab-info -->
           <!-- tab-file -->
-          <uib-tab index="1" select="showEditor()">
+          <uib-tab index="1" select="showEditor()" ng-if="!state.externalStack">
             <uib-tab-heading> <i class="fa fa-pencil-alt space-right" aria-hidden="true"></i> Editor </uib-tab-heading>
             <form class="form-horizontal" ng-if="state.showEditorTab" style="margin-top: 10px;">
               <div class="form-group">
diff --git a/build/download_docker_binary.ps1 b/build/download_docker_binary.ps1
index b5d6b6c13..a567ff785 100644
--- a/build/download_docker_binary.ps1
+++ b/build/download_docker_binary.ps1
@@ -3,6 +3,7 @@ param (
 )
 
 $ErrorActionPreference = "Stop";
+$ProgressPreference = "SilentlyContinue";
 
 New-Item -Path "docker-binary" -ItemType Directory | Out-Null
 
diff --git a/build/download_kompose_binary.ps1 b/build/download_kompose_binary.ps1
index 4c6246d00..f88b2504e 100644
--- a/build/download_kompose_binary.ps1
+++ b/build/download_kompose_binary.ps1
@@ -3,5 +3,6 @@ param (
 )
 
 $ErrorActionPreference = "Stop";
+$ProgressPreference = "SilentlyContinue";
 
 Invoke-WebRequest -O "dist/kompose.exe" "https://github.com/kubernetes/kompose/releases/download/$($kompose_version)/kompose-windows-amd64.exe"
diff --git a/build/download_kubectl_binary.ps1 b/build/download_kubectl_binary.ps1
index fe12c8273..d5330762b 100644
--- a/build/download_kubectl_binary.ps1
+++ b/build/download_kubectl_binary.ps1
@@ -3,5 +3,6 @@ param (
 )
 
 $ErrorActionPreference = "Stop";
+$ProgressPreference = "SilentlyContinue";
 
 Invoke-WebRequest -O "dist/kubectl.exe" "https://storage.googleapis.com/kubernetes-release/release/$($kubectl_version)/bin/windows/amd64/kubectl.exe"