diff --git a/backend/windmill-api/src/settings.rs b/backend/windmill-api/src/settings.rs
index 88429d0035..d4f3a53668 100644
--- a/backend/windmill-api/src/settings.rs
+++ b/backend/windmill-api/src/settings.rs
@@ -56,10 +56,10 @@ pub async fn test_email(
     require_super_admin(&db, &authed.email).await?;
     let smtp = test_email.smtp;
     let to = test_email.to;
-    let client = SmtpClientBuilder::new(smtp.host, smtp.port)
+    let mut client = SmtpClientBuilder::new(smtp.host, smtp.port)
         .implicit_tls(smtp.tls_implicit.unwrap_or(false));
     if std::env::var("ACCEPT_INVALID_CERTS").is_ok() {
-        client.allow_invalid_certs();
+        client = client.allow_invalid_certs();
     }
     let client = if let (Some(username), Some(password)) = (smtp.username, smtp.password) {
         if !username.is_empty() {
diff --git a/frontend/src/lib/components/Dev.svelte b/frontend/src/lib/components/Dev.svelte
index b90160eed5..c02fef0756 100644
--- a/frontend/src/lib/components/Dev.svelte
+++ b/frontend/src/lib/components/Dev.svelte
@@ -311,7 +311,7 @@
 		}
 	}
 
-	let mode: 'script' | 'flow' = 'flow' //'script'
+	let mode: 'script' | 'flow' = 'script'
 
 	const flowStore = writable({
 		summary: '',
@@ -375,10 +375,10 @@
 		initialPath: ''
 	})
 
-	$: updateCode($flowStore)
+	$: updateFlow($flowStore)
 
 	let lastSent: OpenFlow | undefined = undefined
-	function updateCode(flow: OpenFlow) {
+	function updateFlow(flow: OpenFlow) {
 		if (lockChanges) {
 			return
 		}
diff --git a/frontend/src/lib/components/ModulePreview.svelte b/frontend/src/lib/components/ModulePreview.svelte
index da7749eddb..91531113b8 100644
--- a/frontend/src/lib/components/ModulePreview.svelte
+++ b/frontend/src/lib/components/ModulePreview.svelte
@@ -23,8 +23,9 @@
 	export let schema: Schema
 	export let pickableProperties: PickableProperties | undefined
 	export let lang: Script.language
-	export let editor: Editor
-	export let diffEditor: DiffEditor
+	export let editor: Editor | undefined
+	export let diffEditor: DiffEditor | undefined
+	export let noEditor = false
 
 	const { flowStore, flowStateStore, testStepStore, pathStore } =
 		getContext<FlowEditorContext>('FlowEditorContext')
@@ -35,7 +36,7 @@
 	let testJob: Job | undefined = undefined
 
 	let stepArgs: Record<string, any> | undefined = Object.fromEntries(
-		Object.keys(schema.properties).map((k) => [
+		Object.keys(schema.properties ?? {}).map((k) => [
 			k,
 			evalValue(k, mod, $testStepStore, pickableProperties, false)
 		])
@@ -89,6 +90,7 @@
 </script>
 
 <TestJobLoader
+	toastError={noEditor}
 	on:done={() => jobDone()}
 	bind:this={testJobLoader}
 	bind:isLoading={testIsLoading}
diff --git a/frontend/src/lib/components/TestJobLoader.svelte b/frontend/src/lib/components/TestJobLoader.svelte
index 746c8bb111..c0dacbeaac 100644
--- a/frontend/src/lib/components/TestJobLoader.svelte
+++ b/frontend/src/lib/components/TestJobLoader.svelte
@@ -5,12 +5,14 @@
 	import type { Preview } from '$lib/gen/models/Preview'
 	import { createEventDispatcher } from 'svelte'
 	import type { SupportedLanguage } from '$lib/common'
+	import { sendUserToast } from '$lib/toast'
 
 	export let isLoading = false
 	export let job: Job | undefined = undefined
 	export let workspaceOverride: string | undefined = undefined
 	export let notfound = false
 	export let jobUpdateLastFetch: Date | undefined = undefined
+	export let toastError = false
 
 	const dispatch = createEventDispatcher()
 
@@ -48,6 +50,9 @@
 			}
 			return testId
 		} catch (err) {
+			if (toastError) {
+				sendUserToast(err.body, true)
+			}
 			// if error happens on submitting the job, reset UI state so the user can try again
 			isLoading = false
 			currentId = undefined
diff --git a/frontend/src/lib/components/flows/content/FlowModuleComponent.svelte b/frontend/src/lib/components/flows/content/FlowModuleComponent.svelte
index f550dff29a..bb2240a77f 100644
--- a/frontend/src/lib/components/flows/content/FlowModuleComponent.svelte
+++ b/frontend/src/lib/components/flows/content/FlowModuleComponent.svelte
@@ -346,6 +346,7 @@
 									mod={flowModule}
 									{editor}
 									{diffEditor}
+									{noEditor}
 									lang={flowModule.value['language'] ?? 'deno'}
 									schema={$flowStateStore[$selectedId]?.schema ?? {}}
 								/>