Trying to install the plugin, can you tell me how to fix it?

Hi Guys,

I get this when trying to install the plugin, can you tell me how to fix it?

Installing Plugin: WPMU DEV Dashboard

Downloading install package from https://premium.wpmudev.org/wdp-un.php?action=install_wpmudev_dash…

Unpacking the package…

Fatal error: Allowed memory size of 67108864 bytes exhausted (tried to allocate 130153 bytes) in /home/paylessc/public_html/onrushes.com/wp-admin/includes/file.php on line 630