help center is not working in arabic iOS swift

I have integrated help centre and support. Both are working fine in English. I have also enabled arabic language in Zendesk. But when I am setting up arabic in swift using

if Locale.current.isRightToLeft {
            Support.instance?.helpCenterLocaleOverride = "ar"
        } else {
            Support.instance?.helpCenterLocaleOverride = "en-us"
        }

its saying that unable to connect. 

the url for Zendesk Support is 

https://righthandssupport.zendesk.com/hc/ar