BuddyPress won’t be interfering unless something’s gone terribly wrong. Turn it back on, clear your cache, try to click the widget buttons again. If it doesn’t work, then look at the javascript console in your web browser, and do let us know if there are any error or warning messages.
Clearing cache makes no difference and there are no errors. Could be a WordPress issue I guess. Just wondered whether anyone had encountered anything like this before.
Thanks anyway, Paul.
Holy Cow!!!
This fixed it…
https://wordpress.org/support/topic/sidebars-in-widget-admin-area-not-expanding-or-collapsing
“I can’t able to fully understand your problem but I have some solution may be useful to you. Your Problem is may be of WP_MEMORY_LIMIT.
in wordpress root folder open wp-includes/default-constants.php
on line define(‘WP_MEMORY_LIMIT’, ’32M’);
change it to 64M or more.”