Hey Nicola,
Thanks for reaching out to us!
I apologize for the inconvenience of this particular issue. I do want to set some expectations here though. We are happy to help in trying to determine exactly what may be at conflict here, however in many cases we are very limited in the support we’re able to provide for plugin conflicts such as this.
To help here, can you verify that this is the plugin that you’re referring to https://wordpress.org/plugins/telegram-for-wp/?
Also, can you give more details on the root issue here? Particularly, can you give more information around this statement “plugin doesn’t work anymore because it doesn’t publish on the Telegram channel as it did before, but it runs very well if I publish a post.”
Thanks!