Notice - Undefined index: category Warnings after upgrading to Piwik 3

Hello everybody here,
when switching to Personal settings I have 3 warnings as follows, I’m reporting as suggested (upgraded from very previous to latest 3.0.0):

  1. List item /plugins/ScheduledReports/Controller.php(64): Notice - Undefined index: category - Piwik 3.0.0
  2. /plugins/ScheduledReports/ScheduledReports.php(198): Notice - Undefined index: category - Piwik 3.0.0
  3. /plugins/ScheduledReports/ScheduledReports.php(197): Notice - Undefined index: category - Piwik 3.0.0

Cheers

Hello, if you close these notifications, do they re-appear after a while? if so, please create a ticket in our tracker here: Issues · piwik/piwik · GitHub
Thanks!

I have the same issue and when wanting to send a report I get the following error
An error occurred while sending ‘HTML Email Report - 14.2016-12-20.3.en.html’ to xxxxxxx@gmail.com. Error was 'Unable to send mail. ’

Hello Mathieu,
Yes, they continue appearing. Will post on Github.
Cheers