I get a fatal error: Fatal error: Allowed memory size

I get a fatal error:
Fatal error: Allowed memory size of 41943040 bytes exhausted (tried to allocate 228998 bytes) in /home/reloadedairsoft/public_html/wp-content/plugins/wpmudev-updates/includes/class-wpmudev-dashboard-site.php on line 997

Can´t log in to the site!