When Adding a SendEmailNode with the Provider "resend" I do see the following error message in the GUI in the output schema:

the export spur is below.

When I run the agent, the mail gets sent via resend, but an exception is thrown.

  File "/pyspur/backend/pyspur/nodes/base.py", line 227, in __call__
    output_validated = self.output_model.model_validate(result.model_dump())
                       ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "/usr/local/lib/python3.12/site-packages/pydantic/main.py", line 627, in model_validate
    return cls.__pydantic_validator__.validate_python(
           ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
pydantic_core._pydantic_core.ValidationError: 1 validation error for SendEmailNode_1
provider
  Input should be a valid dictionary or instance of EmailProvider [type=model_type, input_value=<EmailProvider.RESEND: 'resend'>, input_type=EmailProvider]
    For further information visit https://errors.pydantic.dev/2.10/v/model_type

The above exception was the direct cause of the following exception:

Traceback (most recent call last):
  File "/pyspur/backend/pyspur/execution/workflow_executor.py", line 628, in _execute_node
    output = await node_instance(node_input)
             ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "/pyspur/backend/pyspur/nodes/base.py", line 240, in __call__
    raise ValueError(f"Output validation error in {self.name}: {e}") from e
ValueError: Output validation error in SendEmailNode_1: 1 validation error for SendEmailNode_1
provider
  Input should be a valid dictionary or instance of EmailProvider [type=model_type, input_value=<EmailProvider.RESEND: 'resend'>, input_type=EmailProvider]
    For further information visit https://errors.pydantic.dev/2.10/v/model_type```

**Here is the JSON Export of the SPUR**

{
"name": "New Workflow 30.6.2025, 09:26:40",
"definition": {
"nodes": [
{
"id": "input_node",
"title": "input_node",
"parent_id": null,
"node_type": "InputNode",
"config": {
"output_schema": {
"input_1": "string"
},
"output_json_schema": "{"type": "object", "properties": {"input_1": {"type": "string"} } }",
"has_fixed_output": false,
"enforce_schema": false
},
"coordinates": {
"x": 145,
"y": 96.25
},
"dimensions": null,
"subworkflow": null
},
{
"id": "1b3a1285-4e44-4875-9b88-63d759de5d58",
"title": "SendEmailNode_1",
"parent_id": null,
"node_type": "SendEmailNode",
"config": {
"title": "SendEmailNode_1",
"type": "object",
"output_schema": {
"provider": "string",
"message_id": "string",
"status": "string",
"raw_response": "string"
},
"output_json_schema": "{"$defs": {"EmailProvider": {"enum": ["resend", "sendgrid"], "title": "EmailProvider", "type": "string"}}, "properties": {"provider": {"$ref": "#/$defs/EmailProvider", "description": "The email provider used"}, "message_id": {"description": "The message ID from the provider", "title": "Message Id", "type": "string"}, "status": {"description": "The status of the email send operation", "title": "Status", "type": "string"}, "raw_response": {"description": "The raw response from the provider as JSON string", "title": "Raw Response", "type": "string"}}, "required": ["provider", "message_id", "status", "raw_response"], "title": "SendEmailNodeOutput", "type": "object"}",
"has_fixed_output": true,
"provider": "resend",
"from_template": "pyspur@mydomain.de",
"to_template": "toname@mydomain.de",
"subject_template": "Important Mail from PySpur",
"content_template": "{{input_node.input_1}}"
},
"coordinates": {
"x": 580,
"y": 132.5
},
"dimensions": null,
"subworkflow": null
}
],
"links": [
{
"source_id": "input_node",
"target_id": "1b3a1285-4e44-4875-9b88-63d759de5d58",
"source_handle": null,
"target_handle": null
}
],
"test_inputs": [
{
"id": 1,
"input_1": "Hello Mail\n\n1. This is a list\n2. This is the saceon"
},
{
"id": 2,
"input_1": "Testmail"
},
{
"id": 3,
"input_1": "Test Mail"
},
{
"id": 4,
"input_1": "tttt"
}
],
"spur_type": "workflow"
},
"description": ""
}