pinman88

I just faced the same issue. Looks like there is no built-in way. Previously I used _wpcf7_groups_count. But currently I don;t see this in the POST array. So the only way I see is to count fields
Would appreciate maintainer’s advise

No, this button is above the ‘insert into post’ button. Above the ‘insert into post’ button you can see 3 buttons, so ‘link on file’ is second of them (I have russian language for this plugin, so I am not sure that her name is exactly “link on file”).
If i do not click “link on file” before insert into post i am getting the same error
Hope it helps

Just click button ‘link on file’ after you choose the file

One more issue: double opt-in is enabled. But I just get email like a ‘you have been succesfully subscribed’. No need confirmation