This certificate has invalid issuer

[jacland]

From some time (over a month) while opening LuLa site I can see warning:

Safari can’t verify the identity of the website „mer54715.datafeedfile.com”.
The certificate for this website is invalid. You might be connected to a website that is pretending to be
„mer54715.datafeedfile.com”, which could put your confidential information at risk. Would you like to connect ...

and such certificate tree:

GlobalSign Root CA
   AlphaSSL CA - SHA256 - G2
      *.datafeedfile.com

and in details:

*.datafeedfile.com
Issued by: AlphaSSL CA - SHA256 - G2
Expires: Tuesday, 30 October 2018 at 15:14:45 Central European Standard Time

and then annotation in red:

This certificate has invalid issuer

I am using Safari 10.0 on macOS Sierra.

I had conversation with help line person, but no respons regarding how to solve it.

[peene.biber]

Every second web page in Safari is offering such a problem. Its again an Apple problem, bad software not enough testing and a company uninterested in the users.
So I am too really frustrated but its in line with my other impressions of this company were guy management seems to be more important than the user, the chairman needs exchange that will help

[Christopher Sanderson]

The perils of double posting...

Please see my response to this issue here

Chris

[rdonson]

Every second web page in Safari is offering such a problem. Its again an Apple problem, bad software not enough testing and a company uninterested in the users.
So I am too really frustrated but its in line with my other impressions of this company were guy management seems to be more important than the user, the chairman needs exchange that will help

Wow!  You totally missed the boat on this one.