Installed MariaDB 11.4.5 on Windows Server 2019.
It's not possible to connect to the server using the provided command line client mysql.exe.
Client message:
ERROR 2813 (HY000): Lost connection to server at 'sending authentication information', system error: 0
Server error log:
[Warning] Could not read packet: fd: 1424 state: 1 read length: 4 errno: 0 vio_errno: 1158 length: -1
Tried various versions of the client. It seems that all versions from server < 11.4.1 do work with the server 11.4.5, all clients from server versions >= 11.4.1 do not work.

I specified the server variable connect_timeout = 1000 and tested the client 11.4.5 with varous options:
a) --ssl=0
Connection established immediately
b) -ssl=1 --ssl-verify-server-cert=1
Connection established after 12 seconds
c) --ssl=1 --ssl-verify-server-cert=0
Connection established immediately