Telegram mail not working

Hi all!
After switching to Octobercms 3, the Mail Telegram plugin stopped sending messages, did anyone encounter this?

Hi @Banditman74

Can you try sending mail using the settings → mail templates → test mail function to see if it works there?

no, mail is not sent through the template

“preg_replace(): Argument #3 ($subject) must be of type array|string, Symfony\Component\Mime\Part\Multipart\AlternativePart given” on line 53 of /var/www/domain.local/public_html/plugins/vdomah/mailtelegram/classes/Helper.php