I've got the same error as s_priv, with identical error message log. I only experience this problem when connecting to BolehRoute EU #5 (other servers in this config seem to be fine)
My config is below
client
dev tun
proto udp
route-method exe
route-delay 3
#BolehRoute EU #5
remote br4.bolehvpn.net 443
#BolehRoute UK #1
remote apache.bolehvpn.net 443
#BolehRoute UK #2
remote geronimo.bolehvpn.net 443
#BolehRoute UK #3
remote br5.bolehvpn.net 443
#BolehRoute EU #4
remote cochise.bolehvpn.net 443
#remote-random
resolv-retry 10
nobind
persist-key
#persist-tun
keepalive 3 10
ns-cert-type server
# Set log file verbosity.
verb 1
# Silence repeating messages
mute 20