I’m also unable to submit the form when using the latest version of Safari.
I believe the “Choose file” upload field ([file your-file]) is the issue.
When submitting a form which includes this field, I get a “[Error] Failed to load resource: the server responded with a status of 400 () (feedback, line 0)” error in the console and the form will not submit.
Could you please confirm if you’re using this field and if so, does removing it fix the problem?
Thanks,
J.
