Fatal error: Call to undefined function bw_trace2() in \wp-content\plugins\oik-nivo-slider\admin\oik-activation.php on line 103
This problem is particularly nasty since it breaks the whole admin interface.
The only way to recover is make changes using ftp or cpanel.
Two options for recovery are:
- delete the oik-nivo-slider folder
- comment out the line in error