Everything redirects to my homepage (after transfer to new domain)

See the info in the protected area

Our current website is up and running, no problems at all.
There are few plugins but nothing too much.

Because the company name is about to be changed, there will be a new domainname.
Also there will have to be a new logo in there and some new texts as well.
Nothing special going on.

To be ready to transfer the site to it’s new domain I fugured to create new folder in the current domain.
Also I made a new database and with the plugin “Duplicator” I did what I have done multiple times before.

I copied the whole thing to a new folder.

I set it up and all seems to work… BUT
Every link in the page redirects to the home page of my current site.
I have disabled ALL plugins but hte issue is the same.

I realy have no clue about where to look.
– .htaccess checked
– plugins disabled
– ??
Can you please shed some light on this one?

I intend to copy tis new site rom its temporary folder to a definitive destination once the page is ready to go live!

Thanks !!