after installing letsencrypt when adding ssl to domain i get this message

after installing letsencrypt when adding ssl to domain i get this message


WARNING! Letsenycrpt Certificate installation failed, please check /etc/letsencrypt/live/domain.com !
yum is /usr/bin/yum
Package augeas-libs-1.0.0-10.el6.x86_64 already installed and latest version
Package libffi-devel-3.0.5-3.2.el6.x86_64 already installed and latest version
Package redhat-rpm-config-9.0.3-51.el6.centos.noarch already installed and latest version
Package python-2.6.6-66.el6_8.x86_64 already installed and latest version
Package python-devel-2.6.6-66.el6_8.x86_64 already installed and latest version
Package python-tools-2.6.6-66.el6_8.x86_64 already installed and latest version
Error:  Multilib version problems found. This often means that the root
       cause is something else and multilib version checking is just
       pointing out that there is a problem. Eg.:
       
         1. You have an upgrade for openssl which is missing some
            dependency that another package requires. Yum is trying to
            solve this by installing an older version of openssl of the
            different architecture. If you exclude the bad architecture
            yum will tell you what the root cause is (which package
            requires what). You can try redoing the upgrade with
            --exclude openssl.otherarch ... this should give you an error
            message showing the root cause of the problem.
       
         2. You have multiple architectures of openssl installed, but
            yum can only see an upgrade for one of those arcitectures.
            If you don't want/need both architectures anymore then you
            can remove the one with the missing update and everything
            will work.
       
         3. You have duplicate versions of openssl installed already.
            You can use "yum check" to get yum show these errors.
       
       ...you can also use --setopt=protected_multilib=false to remove
       this checking, however this is almost never the correct thing to
       do as something else is very likely to go wrong (often causing
       much more problems).
       
       Protected multilib versions: openssl-1.0.1e-57.el6.x86_64 != openssl-1.0.1e-48.el6_8.4.i686
Could not install OS dependencies. Aborting bootstrap!


now what shall i do ?

ok i found article from google and i update yum by typing

yum update

from SSH command line

now when i added ssl certificate to my domain

but it showed me a message after adding the ssl certificate that it cannot restart httpd

Stopping httpd: [  OK  ]
Starting httpd: httpd: Syntax error on line 192 of /etc/httpd/conf/httpd.conf: Cannot load /etc/httpd/modules/mod_proxy_wstunnel.so into server: /etc/httpd/modules/mod_proxy_wstunnel.so: cannot open shared object file: No such file or directory
[FAILED]

now what shall i do to resolve this ?