Ssl issue : can not connect to Dolibarr API with N8N

What type of hardware are you using: VPS bought online
What YunoHost version are you running: 12.1.39
How are you able to access your server: SSH
Are you in a special context or did you perform specific tweaking on your YunoHost instance ?: no

Describe your issue

I use n8n flows with Dolibarr. Recently I have transfered a Dolibarr instance on a Yunohost server. It works fine, except that my n8n flows can not access to Dolibarr. Detailed error attached.

Of course I have modified the credentials in N8N but it seems they are not even checked.
The n8n server IP doesn’t seem banned by fail2ban.
My domain has a valid certificate.
If I try to ignore ssl issues my api call fails because it is redirected to Yunohost SSO.

I think there is something wrong with the way Yunohost deals with ssl but I don’t know where to search, and obviously how to solve it.

Thanks very much if you can help me !

Share relevant logs or error messages

{
“errorMessage”: “SSL Issue: consider using the ‘Ignore SSL issues’ option”,
“errorDetails”: {
“rawErrorMessage”: [
“SSL Issue: consider using the ‘Ignore SSL issues’ option”
]
},
“n8nDetails”: {
“nodeName”: “HTTP Request9”,
“nodeType”: “n8n-nodes-base.httpRequest”,
“nodeVersion”: 4.2,
“itemIndex”: 0,
“time”: “01/02/2026 10:37:55”,
“n8nVersion”: “2.5.2 (Self Hosted)”,
“binaryDataMode”: “filesystem”,
“stackTrace”: [
“NodeApiError: SSL Issue: consider using the ‘Ignore SSL issues’ option”,
" at ExecuteContext.execute (/var/www/n8n/node_modules/n8n-nodes-base/nodes/HttpRequest/V3/HttpRequestV3.node.ts:864:16)“,
" at processTicksAndRejections (node:internal/process/task_queues:105:5)”,
" at WorkflowExecute.executeNode (/var/www/n8n/node_modules/n8n-core/src/execution-engine/workflow-execute.ts:1046:8)“,
" at WorkflowExecute.runNode (/var/www/n8n/node_modules/n8n-core/src/execution-engine/workflow-execute.ts:1227:11)”,
" at /var/www/n8n/node_modules/n8n-core/src/execution-engine/workflow-execute.ts:1659:27",
" at /var/www/n8n/node_modules/n8n-core/src/execution-engine/workflow-execute.ts:2301:11"
]
}
}

FYI my flow is running without error when run from n8n installed on the same server than Dolibarr.

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