1) Check the URL you open. If you use "localhost", it should contain a dot and look like "local.host". 2) There maybe a situation when headers have "local.host" in the application. In this case, add "127.0.0.1 mobitru-tunnel" into the hosts file on your PC. It will look like this: # 127.0.0.1 localhost 127.0.0.1 mobitru-tunnel !!! Do not remove the line with localhost, and start the line with mobitru-tunnel with a new line and without "#". After saving the file and starting Mobitru Connect, use "mobitru-tunnel" instead of "local.host" for opening the server on the device. Where to find the hosts file: - Windows: C:\\Windows\\System32\\drivers\\etc\\hosts. - macOS/Linux: /etc/hosts