Try a different browser.
You don’t have to have a Twitter account or a Free Republic account to use either site.
I have several browsers for anonymity and for convenience.
For example, the Brave browser blocks those nasty nag screens about your ad blocker, because ad-blocking is part of the Brave software itself, not an add-on.
Thanks—I’ve always been able to open twitter—Just lately I can’t . I’m using Mac OS. I do need a good ad blocker.