Hello Sir
in the row you should add Api token (without the 'bot' leading) and the channel name with the @ leading, if your channel called Joseph_h you should enter @Joseph_h .
another thing is to add the boot as administrator of your channel .
How to add the bot as administrator to my channel?
The process it’s simple, you first need to go to your info channel and click on Administrators, By clicking on Add administrator you will be prompt with a search section, search your bot by using the format @yourbotname