Disable/Re-enabled the plugin did the fix for me (read it over in another thread from today).
Disabled and Re-enabled the plugin and it started working for me.
WordPress Version: 4.4
WassUp Version: 1.9
PHP Version: 5.5.30
MySQL Version: 5.1.73-log
In red is
MySQL Max User Connections: 18 (possibly too small)
WordPress Memory Allocation: 40M
Current WassUp table usage is: 393.9 Mb (967882 records)
Was working fine up until update. Hasn’t logged anything since update.
