You have access of phpmyadmin and FTP ?
It look simple to me…
1. disable all plugins
2. go to phpmyadmin > reset password
3. login again with new password…
I hope you know to reset password in phpmyadmin
https://www.youtube.com/watch?v=MqPKyyQ6RbA
Buddypress + RTMedia (plugins)
Could you please share link / screenshot ?
