Re: No input file specified.
Looks like your BP site is up and running!
What is your problem again?
Are you saying you can’t access the BuddyPress menus in the WPMU admin area?
ht*tp://example.com/wp-admin/admin.php?page=buddypress/bp-core.php
What happens when you try to go there?
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It could be an issue with RewriteRules if you changed the settings in the .htaccess file…