Plugin version is the latest. I tried the Stiofan solution and it kept returning the error.
After that I decided to install everything again on another dev area and it doesn’t seem to give any more problems.
Thanks for the support, if it reappears again I will contact you.
Thanks for the reply.
Premising that I have never had a “bio” field in the form, I created one, I redone the registration and did not give an error.
After I removed it and doing the test again and I had the error again.
Great Takayuki, it works!
I was trying to use wpcf7_before_send_mail but it didn’t work.
Thanks a lot.