Cannot connect after upgrading Ubuntu to 16.04

Created by: AdamFonagy

After upgrading to Ubuntu 16.04 I cannot connect to the RDP server earlier I could.

In the terminal I get this message when I connect with Remmina: Gtk-Message: GtkDialog mapped without a transient parent. This is discouraged. [12:25:10:521] [16161:16204] [INFO][com.freerdp.client.common.cmdline] - loading channel cliprdr [12:25:10:577] [16161:16204] [ERROR][com.freerdp.core] - freerdp_set_last_error ERRCONNECT_TLS_CONNECT_FAILED [0x20008] [12:25:10:577] [16161:16204] [ERROR][com.freerdp.core.gateway.tsg] - rpc_connect error! [12:25:10:577] [16161:16204] [ERROR][com.freerdp.core.nego] - Protocol Security Negotiation Failure [12:25:10:577] [16161:16204] [ERROR][com.freerdp.core.connection] - Error: protocol security negotiation or connection failure Gtk-Message: GtkDialog mapped without a transient parent. This is discouraged.

And this when I try to connect with xFreeRDP: [12:13:37:823] [16032:16033] [ERROR][com.freerdp.core] - freerdp_set_last_error ERRCONNECT_TLS_CONNECT_FAILED [0x20008] [12:13:37:823] [16032:16033] [ERROR][com.freerdp.core.gateway.tsg] - rpc_connect error! [12:13:37:824] [16032:16033] [ERROR][com.freerdp.core.nego] - Protocol Security Negotiation Failure [12:13:37:824] [16032:16033] [ERROR][com.freerdp.core.connection] - Error: protocol security negotiation or connection failure [12:13:37:824] [16032:16033] [ERROR][com.freerdp.client.x11] - Freerdp connect error exit status 1

• Client (OS name and version): Ubuntu x64 16.04
• Remmina version (remmina --version): Version 1.2.0-rcgit.14 (git n/a)
• Desktop environment (GNOME, Unity, KDE, ..): Unity
• Connecting to (OS and version): Windows Server
• Connecting via (RDP, VNC, ...): RDP
• RDP issues only, freerdp version (xfreerdp --version): version 2.0.0-dev (git n/a)