Bug: Model calls builder before initializing

[jbotka]

Describe the bug
CRITICAL - 2020-12-28 10:39:14 --> Typed property CodeIgniter\Model::$builder must not be accessed before initialization
-0 server_root\system\Model.php(793): CodeIgniter\Model->builder()
-1 server_root\OS\Auth\Models\TokenModel.php(50): CodeIgniter\Model->__call('where', Array)
-2 server_root\OS\Auth\TokenManager.php(107): OS\Auth\Models\TokenModel->findByAccessToken('2a855fa54046767...')
-3 server_root\OS\Auth\Authentication.php(196): OS\Auth\TokenManager->validateToken()
-4 server_root\OS\Auth\Filters\LoginFilter.php(36): OS\Auth\Authentication->isLogged()
-5 server_root\system\Filters\Filters.php(181): OS\Auth\Filters\LoginFilter->before(Object(CodeIgniter\HTTP\IncomingRequest), NULL)
-6 server_root\system\CodeIgniter.php(403): CodeIgniter\Filters\Filters->run('/', 'before')
-7 server_root\system\CodeIgniter.php(333): CodeIgniter\CodeIgniter->handleRequest(NULL, Object(Config\Cache), false)
-8 server_root\public\OS.launcher.php(47): CodeIgniter\CodeIgniter->run()
-9 {main}

CodeIgniter 4 version
CI 4.0.4 develop - latest

Affected module(s)
Model

Expected behavior, and steps to reproduce if appropriate
Processing. In the last sync with develop worked properly.

Context

• OS: Windows 8.1
• Web server Apache 2.4
• PHP version 7.4.13