Not sending form Safari with upload field not required – Internal Server Error

  • Hello,

    I have checked the issue in different installations and with WordPress and CF7 up to date (Safari version 11.1).

    The form I use has a file upload field which is not required. When you don’t add an attachment on the front-end it will submit the form correctly using the browser Chrome. But when you do the same with Safari, you will get a error: Failed to load resource: the server responded with a status of 500 (Internal Server Error) – http{URL of website}/wp-json/contact-form-7/v1/contact-forms/{id of form}/feedback

    Steps to reproduce the issue.
    – Add a file field to a form in the Form tab.
    – Also add the name of the field in File-attachments in the Mail tab.
    – Try to make a submission on the front-end using the browser Safari.

    Does anyone have experienced this before?

    Kind regards,

    Jordy van Lankveld, WEBBER

    The page I need help with: [log in to see the link]

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