Error while finalizing registration

[Michael-RealT]

We encounter an error when registering a new user with Telegram.
the Bot is correctly configured, we have the possibility to connect between Flarum and Telegram, approved the connection, but when we validate the connection in the Telegram wedget and the window closes, the next step on the forum puts an error in the console
I replaced the irrelevant information with x

Uncaught TypeError: Cannot read properties of null (reading 'app')
    at telegram?id=xxx&first_name=xxx&last_name=xxx&username=xxx&photo_url=xxx&auth_date=1727255369&hash=xxx:1:39

when I click on the links of the script that generates the error I get

<script>
    window.close();
    window.opener.app.authenticationComplete({
        "username": "xxx",
        "avatar_url": "https:\/\/t.me\/i\/userpic\xxx",
        "token": "xxx",
        "provided": ["username", "avatar_url"]
    });
</script>

Flarum version:
Flarum: 1.8.5
PHP: 8.0.30
MySQL: 10.5.26-MariaDB-ubu2004
Queue driver: sync
Session driver: file

what other information could I provide to help you fix the problem?