Events+ Fatal Error on wordpress when I login after installing

I tried to install Events+ and the whole site has just crashed. I get this error when I login to wordpress: Fatal error: Allowed memory size of 41943040 bytes exhausted (tried to allocate 19456 bytes) in <path>/Ops/wp-admin/menu.php on line 43
<path> replaces long pathname I dont care to display.

Please assist ASAP