Possible Solutions;
1) Use Chrome as the default browser.
2) You should not use an Ads-blocking extension in the browser extensions section.
3) If your extensions are not a problem, observe the applications running in the background from the task manager.
It is known that with some programs, your browser can be interfered with, and it can create situations such as ads and some web access restrictions.
4) Disable windows defender and all your anti virus programs.
5) Confirm that your username and password in RealUI are the same as on the site.