N8N Webhook not triggering via tool call in Vapi

Hey guys, why am I getting this error sometimes when calling my webhook in my self-hosted instance on hostinger and other times it works as intended?

[ { “name”: “Booking_Tool”, “toolCallId”: “call_PjoAEFxxxxxxxxxxxxxxxxG3d6”, “type”: “function”, “serverUrl”: “https://n8n.xxxxxxx.hstgr.cloud/webhook/2d97f358-xxxx-xxxx-xxxx-7a22d957f420”, “error”: "Your server rejected tool-calls webhook. Error: " } ]

Additional context: I'm using Vapi and it always works as intended when doing the built-in test call for the tool.

I am also not seeing the webhook node failing within executions, which makes me think it’s not even getting to the node and failing at server level. Been trying to figure this out for a couple of days. Would appreciate any help.

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