Codex Home → Getting Started → Troubleshooting
Troubleshooting
Please read the following and if your problem cannot be resolved then feel free to post in the support forums. Make sure that you include important troubleshooting information.
Check error logs in server.
Switch to a WordPress Default Theme like the Twenty Fourteen or Twenty Thirteen themes, etc. to rule out possible issue/s caused by your theme.
Deactivate all plugins in your Plugins Activated panel except BuddyPress to see if that resolves the problem. Remember to deactivate plugins in the wp-content/mu-plugins folder as well as any custom /code in your wp-content/plugins/bp-custom.php in your server, if any. If the problem is resolved at any stage, reactivate plugins one at a time until you identify the plugin/s which caused the issuue.
If you cannot access your wp-admin/dashboard, you can reset the plugins folder via FTP or phpMyAdmin.
Clear server and/or browser caches.
Download a fresh copy of the latest WordPress and BuddyPress versions and re-upload to server.
For BP theme-related troubleshooting, go to https://buddypress.org/support/topic/basic-troubleshooting-tips/