Getting 405 method not allowed | using HAProxy on top of rest api

Hi, I am facing error after setting up HAProxy on top of two web servers which have a rest api each. I am getting 405 method not allowed error. Here is my configuration file below:
Could someone please look into this?

        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

        # Default SSL material locations
        ca-base /etc/ssl/certs
        crt-base /etc/ssl/private

        # Default ciphers to use on SSL-enabled listening sockets.
        # For more information, see ciphers(1SSL). This list is from:
        # An alternative list with additional directives can be obtained from
        ssl-default-bind-options no-sslv3

        log     global
        mode    http
        option  httplog
        option  dontlognull
        timeout connect 5000
        timeout client  60000
        timeout server  70000
        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 localnodes
    bind *:8021
    mode http

    acl valid_http_method method GET POST HEAD OPTIONS
    http-request deny if ! valid_http_method

    default_backend nodes

backend nodes
    mode http
    balance roundrobin
    option forwardfor
    http-request set-header X-Forwarded-Port %[dst_port]
    http-request add-header X-Forwarded-Proto https if { ssl_fc }
    #option httpchk POST /status
    #http-check expect status 200
    #option tcp-check
    option httpchk OPTIONS /
    #option httpchk HEAD /
    server web01 check
    server web02 check

listen stats
        bind *:8082
        stats enable
        stats hide-version
        stats show-node
        stats uri /stats
        stats auth admin:mypassword
        stats refresh 5s

you may want to add PUT, DELETE, and any other rest verbs you may be using, in your acl

good luck