We can’t log you in because of the following error.
NO_ACCESS: Unable to find a user

Here's the SSO handler code:
 

global class SocialRegHandler implements Auth.RegistrationHandler{
    
    private static final String ORG_SUFFIX = '.sso.badge.org';
    public static final String DEFAULT_ACCOUNTNAME = 'MADD';
    
/**
 * Let anyone register as long as the required fields are supplied
 * 
 * We require email, lastName, firstName
 * 
 * @data - the user's info from the Auth Provider
 **/ 
global boolean canCreateUser(Auth.UserData data) {
    System.debug('canCreateUser was called for ' + (data != null ? data.email : 'null'));
    Boolean retVal = (data != null 
            && data.email != null
            && data.lastName != null
            && data.firstName != null);
    
    System.debug('data.username='+data.username);
    System.debug('data.email='+data.email);
    System.debug('data.lastName='+data.lastName);
    System.debug('data.firstName='+data.firstName);
    
    return retVal;
}

/**
 * Create the User - A required method to implement the Handler Interface
 * 
 * @param portalId  - Id of the Community
 * @param data - Auth Provider user data describing the User to create
 * 
 * @return User that has been initialized
**/ 
global User createUser(Id portalId, Auth.UserData data){
    if(!canCreateUser(data)) {
            if(data.email != null){
            User u = [Select Id , username from User where email =: data.email];
            return u;
        } else {
            return null;
        }
        
    }
    
    // Is this a Community Context?
    if(data.attributeMap.containsKey('sfdc_networkid')) {
        System.debug('Registering Community user: ' + data.email);
        
        // To keep things modular, we're creating the PersonAccount in a separate method
        // Id contactId = createPersonAccountContact(data);
        Contact c = new Contact();
        c.LastName = data.lastName;
        c.FirstName = data.FirstName;
        c.Email = data.email;
        insert c;
        
        // You'd likely use other logic to assign the Profile
        Profile p = [SELECT Id FROM profile WHERE name='MADD Customer Community User'];

        // Keeping it modular, we initialize the user in another method
        User u = createUser(data,p);
        
        u.contactId = c.id;
        return u;
    } else {
        //This is not a community, so we Assign an internal profile
        Profile p = [SELECT Id FROM profile WHERE name='Standard User'];
        
        // Keeping it modular, we initialize the user in another method
        User u = createUser(data,p);

        return u;
    }
}

/**
 * Update the user
 * @param portalId  - Id of the Community
 * @param data - Auth Provider user data describing the User to create
 **/     
global void updateUser(Id userId, Id portalId, Auth.UserData data){
    System.debug('Update User called for: ' + data.email);
    
    User u = new User(id=userId);
    u.email = data.email;
    u.lastName = data.lastName;
    u.firstName = data.firstName;
    update(u);
}
    /**
     * Create a PersonAccount for the contact
     * 
     * @param data - Facebook provided context for this User
     
    private Id createPersonAccountContact(Auth.UserData data) {
        Account person = new Account();
        person.LastName = data.lastName;
        person.FirstName = data.FirstName;
        person.personEmail = data.email;
        person.RecordTypeId = [Select Id From RecordType 
                                Where SobjectType='Account' 
                                  AND isPersonType=true LIMIT 1].id;
        
        insert person;
        
        System.debug('Person Account created for ' + data.email + ' id=' + person.id);
        
        /**
         * This next step is necessary to get a valid contact Id,
         * it won't exist until the PersonAcct is saved
                 
        Account a = [Select PersonContactId From Account Where Id = :person.Id];
        
        return a.PersonContactId; 

    }
    **/
    /**
     * Create and initialize the User but don't save it yet
     * 
     * @param data - the provided User context from FaceBook
     * @param p - the Profile we are going to assign to this user
     * 
     * @return User that has been initialized but not Saved
     **/ 
    private User createUser(Auth.UserData data, Profile p) {
        User u = new User();
        u.username = data.email + ORG_SUFFIX;
        u.email = data.email;
        u.lastName = data.lastName;
        u.firstName = data.firstName;
        String alias = data.firstName + data.lastName;
        
        //Alias must be 8 characters or less
        if(alias.length() > 8) {
            alias = alias.substring(0, 8);
        }
        u.alias = alias;
        u.languagelocalekey = UserInfo.getLocale();
        u.localesidkey = UserInfo.getLocale();
        u.emailEncodingKey = 'UTF-8';
        u.timeZoneSidKey = 'America/Los_Angeles';
        u.profileId = p.Id;
        return u;
    }
    
    
}

Customer community users cannot self register, so I'm getting the error message when signing in as an active customer community user with the same email address attached to the Facebook ID as the Contact and Customer Community user.

Are their any settings, etc. I'm missing?