Wordpress Subdomain Problem

Hello there

I have 2 subdomains. Let's call them 1 and 2. Both subdomains have the same wp-admin login.

I'm trying to login to my 1st subdomain but the 2nd one opens.

1. I can't login to subdomaie.

How can this be?

There is something in my 1st subdomain that I have been trying to solve for months and I solved it yesterday.

I cannot reach it.

Could you help?

Redirect issues I guess,
Try this:
after login, manually enter the 2 subdomain wp-admin page in the browser and check the url wordpress address and site address are correctly pointing in general settings page. If that is correct, then check the htaccess file in file manager of the cpanel.

Solved.

Problem was SSL

I deaktive SSL and active again and fixed.

thank you for helping.