Good evening dear community, I was programming an email trigger that sends a template attached with a pdf autimatically when a new account is added. I have a main class, a test class, the trigger and an email template to test it so far but when I am running the test class to check if it works I get this exception:

System.SObjectException: SObject row was retrieved via SOQL without querying the requested field: Account.PersonEmail
Class.HelperContactTrigger.sendEmail
Class.HelperContactTriggerTestneu.myTestMethod

What can I do ? If you need more information please let me know because this very important to me. 

This is the code:
(Main class)
public class HelperContactTrigger {
    //static method
    public static List<Account> sendEmail(List<Account> accounts) {

        //query on template object
        EmailTemplate et=[Select id from EmailTemplate where name= 'MCM'];

        system.debug(et);   //debug to check the template

        //list of emails
        List<Messaging.SingleEmailMessage> emails = new List<Messaging.SingleEmailMessage>();

        //loop
        for(Account con : accounts){

            //check for Account
            if(con.PersonEmail == null && con.PersonEmail != null){

                //initiallize messaging method
                Messaging.SingleEmailMessage singleMail = new Messaging.SingleEmailMessage();

                //set object Id
                singleMail.setTargetObjectId(con.Id);

                //set template Id
                singleMail.setTemplateId(et.Id);

                //flag to false to stop inserting activity history
                singleMail.setSaveAsActivity(false);

                //add mail
                emails.add(singleMail);
            }
        }

        //send mail
        Messaging.sendEmail(emails);

        return accounts;
    }
}

(Test class)
@isTest(SeeAllData=true)
private class HelperContactTriggerTestneu {
public static testMethod void myTestMethod() {

        system.debug('### NewAccountTest ###');
        Account acc = new Account(Name = 'Test Test');
      
        {
        insert acc;

        List<Account> sendMail = [select id from account where (Name='Test Test') and id=:acc.id];
        test.startTest();
        HelperContactTrigger.sendEmail(sendMail);
        test.stopTest();
        System.assert(acc !=null);
        }
        }
        }


Thanks in advance ! :)