not supported calendar message.ics

[warfriet]

Baikal version: 0.10.1

Expected behaviour:
When I invite a person via email the ics file is not supported with MS Outlook.

I have changed the CalendarObject.php at the put():
public function put($calendarData)
{
if (is_resource($calendarData)) {
$calendarData = stream_get_contents($calendarData);
}

// Ensure event data begins with BEGIN:VEVENT
if (strpos($calendarData, "BEGIN:VEVENT") !== false) {
    $eventStartPos = strpos($calendarData, "BEGIN:VEVENT") + strlen("BEGIN:VEVENT\n");

    // Insert UID if missing
    if (strpos($calendarData, 'UID:') === false) {
        $uid = "UID:" . uniqid() . "@example.com\n";
        $calendarData = substr_replace($calendarData, $uid, $eventStartPos, 0);
    }

    // Insert SUMMARY if missing
    if (strpos($calendarData, 'SUMMARY:') === false) {
        $summary = "SUMMARY:Untitled Event\n";
        $calendarData = substr_replace($calendarData, $summary, $eventStartPos, 0);
    }
}

// Fold long lines
$lines = explode("\n", $calendarData);
foreach ($lines as &$line) {
    if (strlen($line) > 75) {
        $line = foldLine($line);
    }
}
$calendarData = implode("\n", $lines);

// Update the calendar object in the backend
$etag = $this->caldavBackend->updateCalendarObject(
    $this->calendarInfo['id'],
    $this->objectData['uri'],
    $calendarData
);

$this->objectData['calendardata'] = $calendarData;
$this->objectData['etag'] = $etag;

return $etag;

}

Current behaviour:
When received in MS Outlook the file is marked as not supported calendar message.ics
Looks if Baikal does not make an correct ics file.
This is in the ics file:
ATTENDEE;CN=Person Company;PARTSTAT=NEEDS-ACTION;CUTYPE=INDIVIDUAL;
ROLE=REQ-PARTICIPANT:mailto:[email protected]
ATTENDEE;PARTSTAT=ACCEPTED;CUTYPE=INDIVIDUAL;
ROLE=REQ-PARTICIPANT:mailto:[email protected]
DTSTART;TZID=Europe/Berlin:20241116T113000
DTEND;TZID=Europe/Berlin:20241116T133000
TRANSP:OPAQUE
LOCATION:https://myn.nl/trainingen/myn-academy-get-the-cake
X-MOZ-GENERATION:3
SEQUENCE:2
DTSTAMP:20241114T161806Z
BEGIN:VALARM
ACTION:DISPLAY
TRIGGER:PT0S
DESCRIPTION:Default Mozilla Description
END:VALARM
END:VEVENT
END:VCALENDAR

Is this a common bug?
Can it be fixed?