This block breaks integration with Symfony

[tebaly]

https://github.com/danog/MadelineProto/blob/886993a9e41e2c0fe386b78ff1950c6b2a9489d8/src/API.php#L215

This makes it impossible to debug the script and output data to the page

HOTFIX

            if (!$app) {
                return;
                die();
            }

[danog]

You should manually specify an API ID in the settings.

[tebaly]

The Symphony framework has its own graphical debugging/debugging/info system in the browser. This code breaks the system. Use die(); in libraries - antipattern. You use die(); at least two more times in your code