OpenEMR has several options for chat. Note that the questions may not be answered immediately. If unable to get support, then recommend using the OpenEMR Forums.
The OpenEMR Signal Chat can be found at: OpenEMR Signal Chat
The OpenEMR Telegram Chat can be found at: OpenEMR Telegram Chat
The OpenEMR Slack Chat can be found at: OpenEMR Slack Chat
New users can get account/access to the OpenEMR Slack Chat here: https://openemr.herokuapp.com/