How to return to User Control Panel after logging

Using the Hikashop Business edition 1.5.7, I created a menu item for User Control Panel. If you are not logged in, it will take you to the Joomla login page and then it goes to another joomla page. Is there a way to get redirected to the user control panel page after logging from this joomla login page?
Also, what does the entry registration page do? I created a page to see what it was about, and it was linked to a blank page.

Regards the user control panel issue:
The link is: www.khalaselnefoos.org/buyer-control-panel
I even noticed that it page layout is different from the main store page which looks like: www.khalaselnefoos.org/online-bookstore

Regards the Entry Registration page: thanks for the documentation links.

Sent you an email with this an account you can test with.

If you mean the plugin "Redirect Joomla registration to HikaShop Plugin", it is turned on. I tried to deactivate it and still nothing changed. Is there another one?

I am at loss here. I checked all plugins and there is only one joomla plugin named "System-Redirect" and I disabled it and still the same problem. Could this be an issue since we force SSL on the hikashop pages? Is there maybe another setting inside Hikashop that needs to be set for login redirect?

When you login before you access the user control panel page, everything works great. The problem is when you are not logged in and you open this user control panel page, you go a completely empty screen (with just the top menu options and header) and logging in does not return you to hikashop.

When I deactivate the SEF, the login screen stays on the default page (which is better than before as i used to go to another empty screen with login fields only). However, after logging in, I do not go to the control panel but to the joomla user data profile screen (same as before).

So, to solve my problem, here is the compromise I reached. I created a login module on the hikashop page and set the url redirection at login to the hidden menu page for the user control panel and set the url redirection at logout to the main hikashop page. Because joomla gives you access to write in the exact urls for login and logout, I was able to attach this feature (user control panel). Otherwise, it does not work from inside hikashop.