Fatal error: Cannot redeclare class WPMUDEV_Dashboard

Dear WPMUDEV,

I am trying to install WPMUDEV Dashboard into my WP multisite but I am getting error when attempting to activate it. (as seen below)

What are the steps for me to take to resolve this error?

best regards
Ken Goh

Fatal error: Cannot redeclare class WPMUDEV_Dashboard in /database/colorwa/public_html/wp-content/plugins/wpmudev-updates/update-notifications.php on line 40