/usr/bin/remmina:11:freerdp_channels_find_by_open_handle:FreeRDP_VirtualChannelWrite:svc_plugin_send:cliprdr_packet_send:cliprdr_process_event

The Ubuntu Error Tracker has been receiving reports about a problem regarding remmina. This problem was most recently seen with package version 1.1.2-3ubuntu2, the problem page at https://errors.ubuntu.com/problem/bf4c9e8987c6d5e1add0e637228757812c7dbece contains more details, including versions of packages affected, stacktrace or traceback, and individual crash reports.
If you do not have access to the Ubuntu Error Tracker you can request it at http://forms.canonical.com/reports/.