I am also unable to register new user accounts. I have a checkbox field on the registration page which always fails to validate with message “this is a required field”. Doesn’t matter how many boxes I tick. It always fails.
Also, there’s a php notice on my registration page. This one: Warning: trim() expects parameter 1 to be string, array given in /public_html/wp-content/plugins/buddypress/bp-members/screens/register.php on line 93
