I have tried to load a mega menu plugin (3rd party)

I have tried to load a mega menu plugin (3rd party) and when I activate it (Using normal WP upload plugin and activate features. ) I get this error code .
Allowed memory size of 67108864 bytes exhausted (tried to allocate 262161 bytes) in /home/content/30/8629730/html/community/wp-content/plugins/wpmudev-updates/includes/class-wpmudev-dashboard-site.php on line 997.