EU log in not working

I am an EX EU employee and have access via a double authenticated procedure to the "EU LOGIN" which gives me access to several internal webpages of my former work organisation. The most important is the access to the HEALTH SERVICE, which actually is blocked since one week-- and now it seems like this-- '''''through your web browser'''''. I am an ancient Mozilla user and supporter. After claiming my help desk in EU that my EU LOGIN is blocked, I got the answer, try to use another browser- and I saw that with another browser it worked. What happened with Mozilla? Do you want me to go to apple-microsoft or what ever? (english translation of the returning message) Error: Redirection Error The requested website is redirecting the request in such a way that it can never be completed. This problem can sometimes occur if cookies are disabled or rejected.