just updated demo.matomo.org to beta4 and now getting heaps of warning like:
WARNING: Trying to add two strings in DataTable\Row::sumRowArray: 0 + -58.4% for row # ['nb_visits' => 84389, 'nb_actions' => 302230, 'Actions_nb_pageviews' => 132551, 'Goal_revenue' => 1462.6, 'Goal_nb_conversions' => 5628, 'Goal_0_nb_conversions' => 0, 'Goal_0_revenue' => 0, 'label' => -2, 'visits_evolution' => 0, 'actions_evolution' => 0, 'pageviews_evolution' => 0, 'revenue_evolution' => 0, 'nb_conversions_evolution' => 0, 'orders_evolution' => 0, 'ecommerce_revenue_evolution' => 0, 'nb_pageviews' => 98667, 'revenue' => 307868.6, 'nb_conversions' => 3849, 'orders' => 1557, 'ecommerce_revenue' => 305945.6]  [idsubtable = ]<br />
it looks like this:
@diosmosis I've debugged locally and looked into code and then temporarily disabled proxysite on demo and then the error occurred. It can be reproduced on https://demo.matomo.org/index.php?module=MultiSites&action=index&idSite=1&period=day&date=yesterday when ProxySite is enabled. I think we have fixed this issue in https://github.com/matomo-org/matomo/pull/13853 already? The patch is now applied on the demo instance but still seems to occur?
@tsteur would need to be applied on demo-proxy and demo, since the target instance would need to generate the totals row. Then demo would see it and not calculate it again. If it's on both, then would have to look some more.
Just to be sure as I think you mentioned it before in chat. Should I apply the whole Reports Total calculator patch on the demo so the totals row will be returned and won't be processed again?
Applied the patch and it is now fixed. Can reload https://demo.matomo.org/index.php?module=MultiSites&action=index&idSite=62&period=day&date=yesterday as often as I want but does not appear anymore.
I'm still seeing the warnings on the demo which is running 3.8.0-rc2:
From 2019-01-07 to 2019-01-13
WARNING: Trying to add two strings in DataTable\Row::sumRowArray: 0 + 33% for row # ['label' => -2, 'nb_visits' => 6093, 'nb_hits' => 11605, 'sum_time_spent' => 768459, 'nb_hits_following_search' => 35, 'nb_hits_with_time_generation' => 10819, 'min_time_generation' => 0.003, 'max_time_generation' => 55.676, 'entry_nb_visits' => 1874, 'entry_nb_actions' => 8126, 'entry_sum_visit_length' => 455983, 'entry_bounce_count' => 648, 'exit_nb_visits' => 2212, 'sum_daily_nb_uniq_visitors' => 5323, 'sum_daily_entry_nb_uniq_visitors' => 1748, 'sum_daily_exit_nb_uniq_visitors' => 2059, 'avg_time_on_page' => 0, 'bounce_rate' => 0, 'exit_rate' => 0, 'avg_time_generation' => 0]  [idsubtable = ]<br />
Still seeing the error on demo.matomo.org today, any idea @diosmosis ?
Updating demo to 3.8.1 from a rc, should fix this.