Unable to access wordpress admin panel

Good morning all,
I am kind of new to wordpress. I recently installed a wp theme (Zerif Lite, from themeisle) and some plugins. The site was working fine since I installed originally, up to finish, but today when I tried to access the wp admin panel I got this message:

“The page isn’t redirecting properly
Firefox has detected that the server is redirecting the request for this address in a way that will never complete.
* This problem can sometimes be caused by disabling or refusing to accept cookies”

and instead it takes me to a wp panel asking me on which language I want to install wordpress! Does this mean I have to re-install it and re-create the whole website from scratch? (I hope not!). I have the same result when directly entering my website address on the browser. I thought it was a browser issue (I am using Firefox), but Chrome does the same, I also get the same “redirection” result.

The last time I was working on the site I was working on the Contact Form 7, specifically on the 2nd email (autoresponder) section before logging out after making some changes. Before loggin out the last time everything was working fine, and had no problems whatsoever when testing all the changes made so far. Everything was working just great, with no indication of malfunction or having any issue at all, and always was able to access the admin panel with no problem, expect today.

The address of my website is: https://www.realestateandtaxhelp.com, in case someone needs it for pinpointing a solution.

I have re-renamed the plugins (via FTP) and theme folders (individually and both at the same time), re-tried the access to the admin panel and named the folders back to their original names and nothing works. I am not an advance user and would appreciate any help on this. Thank you in advance.