erro with sql INSERT

Question

hello everyone, I'm trying to register, but this part of the code is giving error. The connection is correct, since the login works. But I can't find the error that prevents the code from registering the user. thanks for listening
https://code.sololearn.com/wMmiTveysUw8/?ref=app
erro:
[or die("erro ao cadastrar")]
this is the error that is appearing, instead of registering it takes the 'die'

Answer 1

what error do you get ?
the error from mysqli_error($con)

Answer 2

I edited

Answer 3

just try echoing mysqli_error($con)
or die(mysqli_error($con))
should be fine, you can change it later.

Answer 4

dont't have error

Answer 5

every error that occur when executing a query, are stored by mysqli. and we can only retrieve it using mysqli_error()
without that its impossible to tell what went wrong when the query being executed.

Answer 6

strange.... dont appears any error