Go to the Bitrix24 portal and enter your workspace.
In the left side menu, select the Applications -Market section.
In the search bar, enter "ChatApp", select the found application and click on the "View" button
On the application page, click on the "Install" button.
Read the information in the window that opens. Read the License Agreement and Privacy Policy, then check the consent boxes and click the button "Install".
When the application is installed, log in to your ChatApp account in the application on the Bitrix24 portal. To do this, enter Login and Password.