WPMUDEV Dashboard Version 4.03 Bogging Down Site Periodically

Hello,

We are running WP 4.3.1.

Since upgrading to v 4.03 we have have the site hang up and cease responding more than once. Removing the plugin via FTP has restored site responsiveness multiple times.

I discovered this in the wp-admin folder error log.

partial log...

[19-Jan-2016 07:43:29 UTC] [WPMUDEV Dashboard Error] HTTP Error: 403 "Forbidden"
[19-Jan-2016 07:43:31 UTC] [WPMUDEV Dashboard Error] HTTP Error: 403 "Forbidden"
[19-Jan-2016 07:48:12 UTC] [WPMUDEV Dashboard Error] HTTP Error: 403 "Forbidden"
[19-Jan-2016 07:48:12 UTC] WPMU DEV error: Upgrade failed - error 1
[19-Jan-2016 07:48:12 UTC] [WPMU DEV Dashboard Info] Project Auto-Upgrade result for 119: Failed...
[19-Jan-2016 07:48:14 UTC] [WPMUDEV Dashboard Error] HTTP Error: 403 "Forbidden"
[19-Jan-2016 07:48:15 UTC] WPMU DEV error: Upgrade failed - error 1
[19-Jan-2016 07:48:15 UTC] [WPMU DEV Dashboard Info] Project Auto-Upgrade result for 119: Failed...
[19-Jan-2016 07:48:17 UTC] [WPMUDEV Dashboard Error] HTTP Error: 403 "Forbidden"
[19-Jan-2016 07:48:17 UTC] WPMU DEV error: Upgrade failed - error 1
[19-Jan-2016 07:48:17 UTC] [WPMU DEV Dashboard Info] Project Auto-Upgrade result for 119: Failed...
[19-Jan-2016 07:48:18 UTC] [WPMUDEV Dashboard Error] HTTP Error: 403 "Forbidden"

and on and on ad nauseum....

Other than downgrading, any ideas.

Thanks,
Phil D