uncaught exception: Missing parameters 'formula' or 'mml'.

in file: /var/www/elearning/public/themes/university/lib/tinymce/plugins/tiny_mce_wiris/integration/lib/com/wiris/plugin/impl/RenderImpl.class.php line 94
#0 /var/www/elearning/public/themes/university/lib/tinymce/plugins/tiny_mce_wiris/integration/showimage.php(10): com_wiris_plugin_impl_RenderImpl->showImage(NULL, NULL, Array)
#1 {main}