Pydio cells and HAproxy

hello,this is my haproxy configuration file
the problem that cells deosn’t work behind HAproxy
what should I change ?

global
log /dev/log local0
log /dev/log local1 notice
chroot /var/lib/haproxy
stats socket /run/haproxy/admin.sock mode 660 level admin expose-fd listeners
stats timeout 30s
user haproxy
group haproxy
daemon
ssl-default-bind-options no-sslv3
# Default SSL material locations
ca-base /etc/ssl/certs
crt-base /etc/ssl/private

   # See: https://ssl-config.mozilla.org/#server=haproxy&server-version=2.0.3&config=intermediate
    ssl-default-bind-ciphers ECDHE-ECDSA-AES128-GCM-SHA256:ECDHE-RSA-AES128-GCM-SHA256:ECDHE-ECDSA-AES256-GCM-SHA384:ECDHE-RSA-AES256-GCM-SHA384:ECDHE-EC>
    ssl-default-bind-ciphersuites TLS_AES_128_GCM_SHA256:TLS_AES_256_GCM_SHA384:TLS_CHACHA20_POLY1305_SHA256
    ssl-default-bind-options ssl-min-ver TLSv1.2 no-tls-tickets

defaults
log global
mode http
option httplog
option dontlognull
retries 3
option redispatch
maxconn 2000
timeout connect 5000
timeout client 50000
timeout server 50000
errorfile 400 /etc/haproxy/errors/400.http
errorfile 403 /etc/haproxy/errors/403.http
errorfile 408 /etc/haproxy/errors/408.http
errorfile 500 /etc/haproxy/errors/500.http
errorfile 502 /etc/haproxy/errors/502.http
errorfile 503 /etc/haproxy/errors/503.http
errorfile 504 /etc/haproxy/errors/504.http

frontend web-https
bind 192.168.56.13:32600 ssl crt /etc/ssl/certs/server.bundle.pem
reqadd X-Forwarded-Proto:\ https
rspadd Strict-Transport-Security:\ max-age=31536000
default_backend pydios

frontend Local_Server
bind 192.168.56.13:80
mode tcp
option forwardfor
default_backend pydios

backend pydios

redirect scheme https if !{ ssl_fc }
balance roundrobin
server pydio1    192.168.56.10:8080 check
server pydio2    192.168.56.11:8080 check

listen stats
bind :32600
stats enable
stats uri /
stats hide-version
stats auth admin:itsme