Domain Redirect, Links To Blank Page Problem

[ Moderator note: moved to Fixing WordPress. ]

I am redirecting some domains I want to sell to my website.
When I enter mydomain.com I am redirected to my site, but URL are mydomain.com not mywebsite.com

It is OK but the problem it is really annoying because when I go to my site using redirected mydomain.com my websites responsive mobile

version don’t work.
When I enter mywebsite.com on android phone everything is OK.

In my case domain name is AllFireworks.com redirecting to my website https://www.wordinvestment.com/AllFireworks-com/

Here is example what I want to achieve:
go to worldpress.com you will be redirected to wn.com

What I want to do.
AllFireworks.com -> (mobile friendly) https://www.wordinvestment.com/AllFireworks-com/ (Buy Now Button link)-> https://uniregistry.com/market/contact/AllFireworks.com

What I have.
AllFireworks.com -> (ok,but not mobile friendly) AllFireworks.com (Buy Now Button link) -> AllFireworks.com (blank page on Firefox, Chrome my desktop pc OK – Chrome my laptop and Android Phone also blank page) (You connection is not secure)

Idea is.
mydomain.com -> mywebsite.com/mydomain-com (buy now button) -> registry.com/domainmarket/mydomain.com (not blank page)

MOST IMPORTANT PART IS TO FIX “BUY NOW” BUTTON AND TXT LINKS TO SHOW MARKET.

And also I noticed on my laptop Chrome Ad-block is completely blocking (mywebsite.com/domain) ,but I don’t have any ads.

I am struggling with this problem for long time now.

Please Someone help!