This is probably because you have installed a too old Python library from the python-telegram-bot. I hope you find it useful and enjoyable to use! If you would like to test it and give us feedback, we would appreciate it. We have also only tested it with Check_MK >2.0, so I cannot guarantee that it will work with older versions. We have not found any bugs so far, but this could vary depending on the environment. I want to note that the bot has only been tested for a few weeks and may still have 1-2 bugs. I won’t go into detail on how it works, but anyone interested can check out the details on GitHub. It allows you to send automatic error messages (alerts) via Telegram and to manually read out information about hosts and services. Since this is currently difficult due to the lack of a Check_MK app or a comparably good Nagios app, we developed the following project: GitHub - deexno/checkmk-telegram-plus: This Telegram bot provides an interface to your Check_MK server. We needed to not only receive messages from Check_MK as soon as a problem occurs, but also to interactively ask for more information. I am excited to introduce our new Telegram plugin, developed because we needed more functionality than the current Telegram plugin provided (which is still very good).

Telegramplus