diff --git a/packages/twenty-front/src/modules/workflow/hooks/useWorkflowRun.ts b/packages/twenty-front/src/modules/workflow/hooks/useWorkflowRun.ts
index 860f21d35..cd414e735 100644
--- a/packages/twenty-front/src/modules/workflow/hooks/useWorkflowRun.ts
+++ b/packages/twenty-front/src/modules/workflow/hooks/useWorkflowRun.ts
@@ -3,6 +3,7 @@ import { useFindOneRecord } from '@/object-record/hooks/useFindOneRecord';
 import { WorkflowRun } from '@/workflow/types/Workflow';
 import { workflowRunSchema } from '@/workflow/validation-schemas/workflowSchema';
 import { useMemo } from 'react';
+import { isDefined } from 'twenty-shared/utils';
 
 export const useWorkflowRun = ({
   workflowRunId,
@@ -14,13 +15,18 @@ export const useWorkflowRun = ({
     objectRecordId: workflowRunId,
   });
 
-  const { success, data: record } = useMemo(
-    () => workflowRunSchema.safeParse(rawRecord),
-    [rawRecord],
-  );
+  const {
+    success,
+    data: record,
+    error,
+  } = useMemo(() => workflowRunSchema.safeParse(rawRecord), [rawRecord]);
+
+  if (!isDefined(rawRecord)) {
+    return undefined;
+  }
 
   if (!success) {
-    return undefined;
+    throw error;
   }
 
   return record;
diff --git a/packages/twenty-front/src/modules/workflow/validation-schemas/workflowSchema.ts b/packages/twenty-front/src/modules/workflow/validation-schemas/workflowSchema.ts
index b740a993d..44793cb92 100644
--- a/packages/twenty-front/src/modules/workflow/validation-schemas/workflowSchema.ts
+++ b/packages/twenty-front/src/modules/workflow/validation-schemas/workflowSchema.ts
@@ -271,7 +271,7 @@ export const workflowTriggerSchema = z.discriminatedUnion('type', [
 // Step output schemas
 export const workflowExecutorOutputSchema = z.object({
   result: z.any().optional(),
-  error: z.string().optional(),
+  error: z.any().optional(),
   pendingEvent: z.boolean().optional(),
 });
 
@@ -286,7 +286,7 @@ export const workflowRunOutputSchema = z.object({
     steps: z.array(workflowActionSchema),
   }),
   stepsOutput: workflowRunOutputStepsOutputSchema.optional(),
-  error: z.string().optional(),
+  error: z.any().optional(),
 });
 
 export const workflowRunContextSchema = z.record(z.any());
diff --git a/packages/twenty-front/src/modules/workflow/workflow-steps/components/WorkflowRunStepOutputDetail.tsx b/packages/twenty-front/src/modules/workflow/workflow-steps/components/WorkflowRunStepOutputDetail.tsx
index 2bec95129..5da5840d1 100644
--- a/packages/twenty-front/src/modules/workflow/workflow-steps/components/WorkflowRunStepOutputDetail.tsx
+++ b/packages/twenty-front/src/modules/workflow/workflow-steps/components/WorkflowRunStepOutputDetail.tsx
@@ -67,7 +67,13 @@ export const WorkflowRunStepOutputDetail = ({ stepId }: { stepId: string }) => {
       ? getTriggerHeaderType(stepDefinition.definition)
       : i18n._(getActionHeaderTypeOrThrow(stepDefinition.definition.type));
 
-  const setRedHighlightingForEveryNode: GetJsonNodeHighlighting = () => 'red';
+  const setRedHighlightingForEveryNode: GetJsonNodeHighlighting = (keyPath) => {
+    if (keyPath === 'error') {
+      return 'red';
+    }
+
+    return undefined;
+  };
 
   return (
     <>
diff --git a/packages/twenty-ui/src/json-visualizer/__stories__/JsonTree.stories.tsx b/packages/twenty-ui/src/json-visualizer/__stories__/JsonTree.stories.tsx
index d2a1df6d0..d73f10558 100644
--- a/packages/twenty-ui/src/json-visualizer/__stories__/JsonTree.stories.tsx
+++ b/packages/twenty-ui/src/json-visualizer/__stories__/JsonTree.stories.tsx
@@ -571,6 +571,9 @@ export const RedHighlighting: Story = {
     value: {
       name: 'John Doe',
       age: 30,
+      address: {
+        city: 'Paris',
+      },
     },
     getNodeHighlighting: () => 'red',
   },
diff --git a/packages/twenty-ui/src/json-visualizer/components/JsonNestedNode.tsx b/packages/twenty-ui/src/json-visualizer/components/JsonNestedNode.tsx
index 06b1d8373..3fdb1a9af 100644
--- a/packages/twenty-ui/src/json-visualizer/components/JsonNestedNode.tsx
+++ b/packages/twenty-ui/src/json-visualizer/components/JsonNestedNode.tsx
@@ -25,8 +25,9 @@ const StyledLabelContainer = styled.div`
   gap: ${({ theme }) => theme.spacing(2)};
 `;
 
-const StyledElementsCount = styled.span`
-  color: ${({ theme }) => theme.font.color.tertiary};
+const StyledElementsCount = styled.span<{ variant?: 'red' }>`
+  color: ${({ theme, variant }) =>
+    variant === 'red' ? theme.font.color.danger : theme.font.color.tertiary};
 `;
 
 const StyledJsonList = styled(JsonList)``.withComponent(motion.ul);
@@ -118,13 +119,25 @@ export const JsonNestedNode = ({
         <JsonArrow
           isOpen={isOpen}
           onClick={handleArrowClick}
-          variant={highlighting === 'partial-blue' ? 'blue' : undefined}
+          variant={
+            highlighting === 'partial-blue'
+              ? 'blue'
+              : highlighting === 'red'
+                ? highlighting
+                : undefined
+          }
         />
 
-        <JsonNodeLabel label={label} Icon={Icon} />
+        <JsonNodeLabel
+          label={label}
+          Icon={Icon}
+          highlighting={highlighting === 'red' ? highlighting : undefined}
+        />
 
         {renderElementsCount && (
-          <StyledElementsCount>
+          <StyledElementsCount
+            variant={highlighting === 'red' ? 'red' : undefined}
+          >
             {renderElementsCount(elements.length)}
           </StyledElementsCount>
         )}
diff --git a/packages/twenty-ui/src/json-visualizer/components/internal/JsonArrow.tsx b/packages/twenty-ui/src/json-visualizer/components/internal/JsonArrow.tsx
index 46da248dc..73737db9b 100644
--- a/packages/twenty-ui/src/json-visualizer/components/internal/JsonArrow.tsx
+++ b/packages/twenty-ui/src/json-visualizer/components/internal/JsonArrow.tsx
@@ -6,16 +6,20 @@ import { useJsonTreeContextOrThrow } from '@ui/json-visualizer/hooks/useJsonTree
 import { ANIMATION } from '@ui/theme';
 import { motion } from 'framer-motion';
 
-const StyledButton = styled(motion.button)`
+const StyledButton = styled(motion.button)<{ variant?: 'blue' | 'red' }>`
   align-items: center;
-  border-color: ${({ theme }) => theme.border.color.medium};
+  background-color: ${({ theme, variant }) =>
+    variant === 'red'
+      ? theme.background.danger
+      : theme.background.transparent.lighter};
+  border-color: ${({ theme, variant }) =>
+    variant === 'red' ? theme.border.color.danger : theme.border.color.medium};
   border-radius: ${({ theme }) => theme.border.radius.sm};
   border-style: solid;
   border-width: 1px;
   display: flex;
   justify-content: center;
   padding-inline: ${({ theme }) => theme.spacing(1)};
-  background-color: ${({ theme }) => theme.background.transparent.lighter};
   height: 24px;
   width: 24px;
   box-sizing: border-box;
@@ -31,7 +35,7 @@ export const JsonArrow = ({
 }: {
   isOpen: boolean;
   onClick: () => void;
-  variant?: 'blue';
+  variant?: 'blue' | 'red';
 }) => {
   const theme = useTheme();
 
@@ -39,7 +43,7 @@ export const JsonArrow = ({
     useJsonTreeContextOrThrow();
 
   return (
-    <StyledButton onClick={onClick}>
+    <StyledButton variant={variant} onClick={onClick}>
       <VisibilityHidden>
         {isOpen ? arrowButtonExpandedLabel : arrowButtonCollapsedLabel}
       </VisibilityHidden>
@@ -47,7 +51,11 @@ export const JsonArrow = ({
       <MotionIconChevronDown
         size={theme.icon.size.md}
         color={
-          variant === 'blue' ? theme.color.blue : theme.font.color.secondary
+          variant === 'blue'
+            ? theme.color.blue
+            : variant === 'red'
+              ? theme.font.color.danger
+              : theme.font.color.secondary
         }
         initial={false}
         animate={{ rotate: isOpen ? 0 : -90 }}