BuddyPress.org

@jhansensd Agree with @hnla. You asked for advice and that’s the standard one that you’ll get to isolate what the conflict is. You might also want to check out
https://codex.buddypress.org/getting-started/before-installing/#wp-configuration
Then if all’s well with BP plugin, you activate your custom theme and see how it works out. install the other WP plugins one by one to find out which one is conflicting with BP.

EDIT – took too long to answer, two already did