I found this issue and it’s an easy fix.
go to blogfolder/wp-content/plugins/slideshow-gallery-2/slideshow-gallery.php with a text editor and change (comment out) these two lines. Here’s what you need to do.
You want to look for these two lines:
$this -> add_filter(‘mce_buttons’);
$this -> add_filter(‘mce_external_plugins’);
They will be on lines 57 and 59. Add to // (slash marks) in front of each line and this fill fix this issue.
//$this -> add_filter(‘mce_buttons’);
//$this -> add_filter(‘mce_external_plugins’);
