Linux RDP client: Connect to machine with self-signed certificate

I can remote into a Windows machine using Windows' default RDP client, but I would like to do it from Linux. The clients I have tried so far complain about a self-signed certificate, although Windows had no complaint. I don't know much about the remote end, but I may ask to provide more info. Vinagre:

[11:54:25:962] [WARN][com.freerdp.core.nla] - SPNEGO received NTSTATUS: STATUS_LOGON_FAILURE [0xC000006D] from server
[11:54:25:962] [ERROR][com.freerdp.core] - nla_recv_pdu:freerdp_set_last_error_ex ERRCONNECT_LOGON_FAILURE [0x00020014]
[11:54:25:962] [ERROR][com.freerdp.core.rdp] - rdp_recv_callback: CONNECTION_STATE_NLA - nla_recv_pdu() fail
[11:54:25:962] [ERROR][com.freerdp.core.transport] - transport_check_fds: transport->ReceiveCallback() - -1
[11:54:25:066] [WARN][com.freerdp.crypto] - Certificate verification failure 'self signed certificate (18)' at stack position 0
[11:54:25:066] [WARN][com.freerdp.crypto] - CN = heatchamber-pc

Remmina:

[12:15:59:884] [WARN][com.freerdp.crypto] - Certificate verification failure 'self signed certificate (18)' at stack position 0
[12:15:59:884] [WARN][com.freerdp.crypto] - CN = heatchamber-pc
[12:16:25:423] [WARN][com.freerdp.core.nla] - SPNEGO received NTSTATUS: STATUS_LOGON_FAILURE [0xC000006D] from server
[12:16:25:423] [ERROR][com.freerdp.core] - nla_recv_pdu:freerdp_set_last_error_ex ERRCONNECT_LOGON_FAILURE [0x00020014]
[12:16:25:423] [ERROR][com.freerdp.core.rdp] - rdp_recv_callback: CONNECTION_STATE_NLA - nla_recv_pdu() fail
[12:16:25:423] [ERROR][com.freerdp.core.transport] - transport_check_fds: transport->ReceiveCallback() - -1

Software versions (openSUSE Tumbleweed): * libfreerdp2-2 2.9.0-3.1 * remmina 1.4.27-3.1 * vinagre 3.22.0-15.7 I also tried Rustdesk, but I really didn't understand that one (its GUI was oriented towards connecting to a remote server with a random ID rather than the correct hostname with the correct username and password).