[Plugin: WordTour] Error Saving settings

In installed the plugins went in to adjust the settings pressed save and got the following error messages

Fatal error: Allowed memory size of 94371840 bytes exhausted (tried to allocate 136 bytes) in /xxxxx/wp-includes/rewrite.php on line 869

Fatal error: Allowed memory size of 94371840 bytes exhausted (tried to allocate 262144 bytes) in /xxxxx/wp-content/plugins/nextgen-gallery/lib/rewrite.php on line 273