/lib/versioncheck.php edit and remove this:
// Show warning if >= PHP 8.2 is used as Nextcloud is not compatible with >= PHP 8.2 for now
if (PHP_VERSION_ID >= 80200) {
http_response_code(500);
echo ‘This version of Nextcloud is not compatible with PHP>=8.2.
’;
echo 'You are currently running ’ . PHP_VERSION . ‘.’;
exit(1);
}