Re: [Resolved] WordPress and BuddyPress broke – New Installation (no other plugins)
Thank you, but still having problems. 
I removed everything from the server and started over. I completed the BuddyPress Setup steps and when I clicked Finish & Activate I got the same 500 error.
Afterwards I updated wp-config.php, the .htaccess file, & upped the memory limits for the site. I tried in different browsers, but to no avail. I don’t have access to my php.ini file, so I’m hoping that’s not the problem. The site seems to be working fine, but the dashboard is still not functional.
Here are the errors I got from the error log:
[Thu Feb 09 18:21:21 2012] [warn] mod_fcgid: stderr: PHP Fatal error: Call to undefined function bp_is_active() in /home/httpd/vhosts/mydomain.com/httpdocs/wp-content/plugins/buddypress/bp-core/admin/bp-core-admin.php on line 45
[Thu Feb 09 18:21:21 2012] [warn] (103)Software caused connection abort: mod_fcgid: ap_pass_brigade failed in handle_request function
[Thu Feb 09 18:21:21 2012] [warn] mod_fcgid: stderr: PHP Fatal error: Allowed memory size of 33554432 bytes exhausted (tried to allocate 122880 bytes) in /home/httpd/vhosts/mydomain.com/httpdocs/wp-admin/includes/screen.php on line 480
[Thu Feb 09 18:21:35 2012] [warn] mod_fcgid: stderr: PHP Fatal error: Allowed memory size of 33554432 bytes exhausted (tried to allocate 30720 bytes) in /home/httpd/vhosts/mydomain.com/httpdocs/wp-admin/includes/screen.php on line 395
[Thu Feb 09 18:22:20 2012] [warn] mod_fcgid: stderr: PHP Fatal error: Allowed memory size of 33554432 bytes exhausted (tried to allocate 30720 bytes) in /home/httpd/vhosts/mydomain.com/httpdocs/wp-admin/includes/screen.php on line 395
[Thu Feb 09 18:22:31 2012] [warn] mod_fcgid: stderr: PHP Fatal error: Allowed memory size of 33554432 bytes exhausted (tried to allocate 7680 bytes) in /home/httpd/vhosts/mydomain.com/httpdocs/wp-admin/includes/screen.php on line 51
Please forgive my idiocy, but I have no clue what to make of that. Please help!
Are you able to tell what the problem is from those error logs?
Thanks again!