BuddyPress.org

you can find your version by click the little wordpress logo in leftmost position of the top admin bar. your question lacks the necessary details to give much specific help but it sounds like there maybe be an issue with your theme or a plugin interfering with the normal registration process. those are probably somewhat dangerous to be messing with if you don’t know what you’re doing but you can try deactivating your plugins one at a time or switching to the default wp theme to see if you can isolate the issue. Some themes will lose certain settings when you switch but most good themes should not.

Try ensure your wordpress, theme and plugins are up to date, clear your browser & restart your computer.

glad to help!