Whatsapp ios cannot link to windows

cannot get my whatsapp (ip 15 base model) to link to whatsapp desktop(windows).

It always appears error and reverts back to first page that have to click get started.

But I can link to whatsapp web and android phone.

I'm sure it's not internet connection problem, because I use the same wifi connection for all device.

Have tried everything including deleting current versions and reinstalling. Both on iphone and desktop.

I have tried to link another phone to the same whatsapp desktop and it worked, I have tried another whatsapp desktop from another laptop also the same issue can't connect. so what is the issue?

PLEASE HELP!