'This store doesn't exist' issue only on mobiles with custom domian

Hi
I have created a store which is working fine on Desktop even on some android phones but it when I visit my domain on mobiles (iPhones ) it shows this error.

have you input https prefix of your domain, cause i saw a not secure notice on your screen

Hi Eric,
It should not be the case as Shopify comes with SSL certificate so it should accept every scenario either its storename.com, www.storename.com, https://www.storename.com or http://storename.com.
even if this is the case, then still it should show blank page with error. but You can see it opens Shopify page but with this message.

Resolved. Domain should be connected twice. One with https and other without this like domainname.com.