Reject function in onCustomValidation event not working

Hi @ahmadnasriya , thanks for anwering again.
Just tried to remove them and it keeps not working.

I’ve tried this version now in the client side:

//Client side (same BACKEND function without parentheses in return)

    $w('#iban').onCustomValidation((iban,reject)=>{
        console.log('validating')

        validarIBAN($w('#iban').value)
        .then((result)=>{
 if(!result.status){
                reject(result.err);
                console.log('validity after reject is: ' + $w('#iban').valid.toString());
            }
        })
    })
    
    $w('#continue').onClick(async()=>{
        $w('#iban').updateValidityIndication();
       console.log('validity after reject is: ' + $w('#iban').valid.toString());
    })

Returning true with values like ‘dd’ or random strings like that.

Any ideas?

Thank you!