Hello fernandomullerjr,
When you mention a GUI on Linux, that usually means using Network Manager, and then perhaps a plugin for it like 'network-manager-openvpn-gnome' or such. That particular tool has an odd quirk where it always assumes that the VPN connection will be used to redirect all your Internet traffic. There should be an option in the settings to tell it to only use this VPN tunnel for the resources it offers, and not to just assume that all Internet traffic must be sent through it.
Other than that, it should work. It should be able to connect with that tool just fine. If it doesn't work for you, please contact us at
https://openvpn.net/support and send some log information that shows the problem with connecting to OpenVPN Cloud. Perhaps we can then pinpoint the problem and solve it.
Just to be clear; OpenVPN Cloud is compatible with OpenVPN 2.4 and 2.5 just fine. And it is compatible with OpenVPN 3 as well. But OpenVPN 3 we only have a command line client for at this time on the Linux operating system. OpenVPN 3 we have the OpenVPN Connect software for on Android, iOS, Windows, and macOS. But even there the same thing holds true - OpenVPN 2 can work just fine with OpenVPN Cloud.
Whatever is wrong with starting the connection - it should be analyzed by looking at error messages and log files to determine the problem. There seems to be some misconfiguration somewhere and by looking carefully we may be able to determine what the problem is.
Kind regards,
Johan