Fatal error on site

Dave
Fatal error on site

WordPress Agent
May I know your Website Address Please ?

Dave
www.********************.com

WordPress Agent
i m checking
http://********************.com/en
its running
may i know where are you facing the issue exactly

Dave
its the wordpress site where we do out updates that we are having issues with

WordPress Agent
okay. so you’re having trouble in updating site content

Dave
i just took over doing the site updates and there was an update that hadn’t been downloaded
i pressed on the download button and it didn’
sorry…didn’t download and now it shows a fatal error has occured

WordPress Agent
update of a new wordpress version or any plugin ?
do you remember what update was that ?

Dave
new wordpress version
4. something (I think)
i can give you our login information to check…I think that might be the best

WordPress Agent
yes. we will look

Dave
username – ***********
password – **************

WordPress Agent
http://********************.com/en/wp-admin
you’re facing fatal error here ?

Dave
on the wordpress site we have the fatal error

WordPress Agent
okay, so you have two different sites for two different language ?
both the sites are on the same domain

Dave
we update the site on wordpress but the website is hosted by godaddy.com

WordPress Agent
yes we know that
I m asking , can you send me the URL of the page where you’re seeing the error

Dave
http://********************.com/en/wp-login.php?redirect_to=http://********************.com/en/wp-admin/

WordPress Agent
can you click this link > http://********************.com/en/wp-admin

Dave
Fatal error: Call to undefined function is_customize_preview() in /home/content/79/4415279/html/en/wp-admin/includes/admin-filters.php on line 49
yes and that is what comes up

WordPress Agent
yes. we got the issue
we’ll fix it

Dave
thanks

WordPress Agent
we’ll need your login details of godaddy

Dave
CUSTOMER NUMBER: *********
Password  **************

WordPress Agent
okay

Dave
can’t understand though why I would get a fatal error when doing an update requested by wordpress!!

WordPress Agent
never update wordpress

Dave
OK

WordPress Agent
Its not like our mobile devices where we update our iOS version or Android version
its complicated
because there are lot of plugins and their codes which are not compatible with each other

Dave
no worries..just so long as you can fix it and I won’t update again

WordPress Agent
yes sir . Thanks
okay sir, issue can be fixed.

Dave
seems odd since the wordpress site said that I didn’t have the latest version and to update….just doing what it told me to do
if you shouldn’t update the site why put a message out there to update???

WordPress Agent
no. wordpress will show update like this. its the feature of wordpress
but you cant update if your developer has build the site via custom code/ customizations

Dave
doesn’t make sense but in any event, needs to get fixed.

WordPress Agent
there are plugins and add ons which get affected by the update.
we will fix your site and make it up and running

WordPress Agent
we will send you email when it will done.
********************@gmail.com

Dave
perfect

WordPress Agent
on this email ID
yes sir

Dave
thanks for your help

WordPress Agent
Welcome sir