DuplicateWhereBuilders Class Does Not Exist

[SoBeGuy]

I'm trying to create a custom DuplicateWhereBuilders class.

I created the class file at custom/Espo/Custom/Classes/DuplicateWhereBuilders/Account.php. The class looks like this:

<?php
namespace Espo\Custom\Classes\DuplicateWhereBuilders;

use Espo\Core\Duplicate\WhereBuilder;

use Espo\ORM\Query\Part\Condition as Cond;
use Espo\ORM\Query\Part\WhereItem;
use Espo\ORM\Query\Part\Where\OrGroup;
use Espo\ORM\Entity;

class Account implements WhereBuilder
{
    public function build(Entity $entity): ?WhereItem
    {...

Then I added the following to custom/Espo/Custom/Resources/metadata/recordDefs/Account.json:

{
    "duplicateWhereBuilderClassName": "Espo\\Custom\\Classes\\DuplicateWhereBuilders\\Account"
}

However, when I try to save an Account record, it displays a 500 error and I see the following in my log:

ERROR: (0) InjectableFactory: Class 'Espo\Custom\Classes\DuplicateWhereBuilders\Account ' does not exist.; PUT /Account/664b9c24abc46dc7a; line: 165, file: /usr/local/lsws/sites/crm.clinicalmatchme.com/application/Espo/Core/InjectableFactory.php

Why isn't it finding the class?

[yuri]

Extra hidden character in the end of the class name ?

[SoBeGuy]

Yes, that was it! Thank you so much for your prompt and helpful response. Not only is EspoCRM the best CRM on the market, but the support in this forum is equally amazing.