Hi Team,
we are getting “were unable to deserialize” error for most of our jobs to send email attachments .Could you let us know how can we fix Create a Draft - Email node issue ?
Full Error message
{ "error": { "code": "UnableToDeserializePostBody", "message": "were unable to deserialize " } }
Our version of the N8N: 2.1.4
Error Message:
were unable to deserialize
Error details
From Microsoft Outlook
Error code
400
Full message
{ "error": { "code": "UnableToDeserializePostBody", "message": "were unable to deserialize " } }
Other info
Item Index
0
Node type
n8n-nodes-base.microsoftOutlook
Node version
2 (Latest)
n8n version
2.1.4 (Self Hosted)
Time
05/01/2026, 12:00:44
Stack trace
NodeApiError: were unable to deserialize at ExecuteContext.requestWithAuthentication (/usr/local/lib/node_modules/n8n/node_modules/.pnpm/n8n-core@file+packages+core_@[email protected]_@[email protected]_ec37920eb95917b28efaa783206b20f3/node_modules/n8n-core/src/execution-engine/node-execution-context/utils/request-helper-functions.ts:1498:10) at processTicksAndRejections (node:internal/process/task_queues:105:5) at ExecuteContext.requestWithAuthentication (/usr/local/lib/node_modules/n8n/node_modules/.pnpm/n8n-core@file+packages+core_@[email protected]_@[email protected]_ec37920eb95917b28efaa783206b20f3/node_modules/n8n-core/src/execution-engine/node-execution-context/utils/request-helper-functions.ts:1798:11) at ExecuteContext.microsoftApiRequest (/usr/local/lib/node_modules/n8n/node_modules/.pnpm/n8n-nodes-base@file+packages+nodes-base_@[email protected]_asn1.js@5_8da18263ca0574b0db58d4fefd8173ce/node_modules/n8n-nodes-base/nodes/Microsoft/Outlook/v2/transport/index.ts:52:10) at ExecuteContext.execute (/usr/local/lib/node_modules/n8n/node_modules/.pnpm/n8n-nodes-base@file+packages+nodes-base_@[email protected]_asn1.js@5_8da18263ca0574b0db58d4fefd8173ce/node_modules/n8n-nodes-base/nodes/Microsoft/Outlook/v2/actions/draft/create.operation.ts:252:23) at ExecuteContext.router (/usr/local/lib/node_modules/n8n/node_modules/.pnpm/n8n-nodes-base@file+packages+nodes-base_@[email protected]_asn1.js@5_8da18263ca0574b0db58d4fefd8173ce/node_modules/n8n-nodes-base/nodes/Microsoft/Outlook/v2/actions/router.ts:51:21) at ExecuteContext.execute (/usr/local/lib/node_modules/n8n/node_modules/.pnpm/n8n-nodes-base@file+packages+nodes-base_@[email protected]_asn1.js@5_8da18263ca0574b0db58d4fefd8173ce/node_modules/n8n-nodes-base/nodes/Microsoft/Outlook/v2/MicrosoftOutlookV2.node.ts:28:10) at WorkflowExecute.executeNode (/usr/local/lib/node_modules/n8n/node_modules/.pnpm/n8n-core@file+packages+core_@[email protected]_@[email protected]_ec37920eb95917b28efaa783206b20f3/node_modules/n8n-core/src/execution-engine/workflow-execute.ts:1045:8) at WorkflowExecute.runNode (/usr/local/lib/node_modules/n8n/node_modules/.pnpm/n8n-core@file+packages+core_@[email protected]_@[email protected]_ec37920eb95917b28efaa783206b20f3/node_modules/n8n-core/src/execution-engine/workflow-execute.ts:1226:11) at /usr/local/lib/node_modules/n8n/node_modules/.pnpm/n8n-core@file+packages+core_@[email protected]_@[email protected]_ec37920eb95917b28efaa783206b20f3/node_modules/n8n-core/src/execution-engine/workflow-execute.ts:1662:27