Since the last Beta upgrade to 184.108.40.206, I always get FREERDP_ERROR_SECURITY_NEGO_CONNECT_FAILED on all the servers I had saved. I think they're using self-signed certs, which used to work.
can you please check the Authentication Level settings within your Remote Desktop Connection properties:
If this doesn't do the trick, please create a ticket here, and we will get back to you:
Thanks & best regards,
User error. I had some plugin overrides configured.
thanks for the info.
Glad you got it working!