[BUG] Http request failed: the content was not a valid JSON

Type of Connector

Independent Publisher Connector

Name of Connector

VIES (Independent Publisher)

Describe the bug

In both a Power Automate cloud flow as a Power App, the connector fails with the following error details:

Http request failed: the content was not a valid JSON. Error while parsing JSON: 'Unexpected character encountered while parsing value: O. Path '', line 0, position 0.'

Is this a security bug?

No, this is not a security bug

What is the severity of this bug?

Severity 1 - Connector is broken or there's a very serious issue

To Reproduce

• Create a flow with a manual trigger
• Add the VIES action
• Enter the country code
• Enter the Vat number
• Test the flow

Expected behavior

A JSON body with the result of the VAT validation

Environment summary

Power Page (canvas app) within Dynamics 365 account form
Power Automate cloud flow for testing

Additional context

• We released the solution with the VIES connector through a canvas app this weekend. After the release the users reported errors. Can't tell for sure when it last worked.
• VIES monitoring doesn't report issues
• The cloud flow was created to reproduce errors.
• The error text is similar to #1955.
• Used Postman to create a SOAP-request using the WSDL, which returned a successful/validated JSON result

Start with the VIES connector reproduction in a Power Automate cloud flow, using the country code and VAT number described in the issue. Compare the connector failure with the successful SOAP request made in Postman from the WSDL, and review related issue #1955. Done means the VIES action returns the expected JSON validation result instead of a parsing error.