Hi Edward,
Do you run the application on Chrome or Edge? Please try running the application on IE to support multiple users.
The limitation of browsers, except for IE, is that they do not support multiple Windows users running the application on the same machine. Not even when users are using different browsers. For example, this is not supported: one user runs the application on Chrome and the other runs the application on Edge. It has to wait till the previous user exits the application and ends the process of AppeonMultiBrowserLauncher.exe, only then can the next user runs the application on whatever browser (Chrome/Edge/Firefox) they use. However, IE doesn’t have this problem since it doesn’t rely on AppeonMultiBrowserLauncher.exe.
Please refer to the article below to solve it if you have any problems with the plugin.
https://www.appeon.com/developers/get-help/knowledgebase/solutions-errors-occured-during-downloading-and-installing-appeon-plug.html
Regards,
Kai