I've spend over 6 hours to find an exception or a special character to find in my code but I couldn't. I checked every similar messages in here.
I'm sending the form with magnific popup. First I'm using inline popup to open my form than I'm sending all inputs to main.js to validate.
So, I just need a third-eye.
Here's the code
Here goes the error messages
Firefox console :
What am i missing?
The fact the character is a < make me think you have a PHP error, have you tried echoing all errors.
Since I don't have your database, I'm going through your code trying to find errors, so far, I've updated your JS file