ERR_TOO_MANY_REDIRECTS

When I try to delete a member which I suspect on his spam works such as bookmarking, creating groups, I sometimes get the message "This page is not working right now. ahalim.com has redirected you too many times. Try deleting your cookies" and below this "ERR_TOO_MANY_REDIRECTS" is displayed. Does this mean that the spammers have achieved their goal, and have infiltrated my site? When I click refresh, there is no return, the error remains. However, when I press return, the page comes back, and it appears that the person I wanted to delete is still there. When I click on the person and try to delete them from the admin options on their profile page, I am able to delete the person.

Any idea to solve the issue?