Some screen prints:

@heurteph-ei Are you able to say which request fails on the dashboard? Should be visible in the browser console.

FYI I would assume that the request itself maybe works but on a next page view these warnings show up? and the failed request is a different issue?

The user says also

If I press reload browser the messages will be gone!, so next time I will copy the HTTP request error

@heurteph-ei This should be fixed with the next release. As we weren't able to reproduce that, feel free to reopen the issue or create a new one, if that still happens with the next release.

i have too error 4.6.2 and
WARNING: /core/DataTable/Row.php(805): Trying to add two strings in DataTable\Row::sumRowArray: 2021-12-18 12:41:58 + 2021-12-18 12:42:02 for column _metadata in row # ['label' => 'EG', 'nb_visits' => 65, 'nb_actions' => 133, 'Actions_nb_pageviews' => 110, 'Goal_revenue' => 0, 'Goal_nb_conversions' => 0, '_metadata' => array ( 'ts_archived' => '2021-12-18 12:41:58', ), 'visits_evolution' => -0.692, 'visits_evolution_trend' => -1, 'actions_evolution' => -0.835, 'actions_evolution_trend' => -1, 'pageviews_evolution' (Module: MultiSites, Action: getAllWithGroups, In CLI mode: false)

WARNING: /core/DataTable/Row.php(805): Trying to add two strings in DataTable\Row::sumRowArray: 0 + 2021-12-18 12:42:07 for column _metadata in row # ['label' => 'EG', 'nb_visits' => 70, 'nb_actions' => 142, 'Actions_nb_pageviews' => 119, 'Goal_revenue' => 0, 'Goal_nb_conversions' => 0, '_metadata' => array ( 'ts_archived' => 0, ), 'visits_evolution' => -1.04, 'visits_evolution_trend' => -2, 'actions_evolution' => -1.219, 'actions_evolution_trend' => -2, 'pageviews_evolution' => -1.255, 'pageviews_evolution_trend' (Module: MultiSites, Action: getAllWithGroups, In CLI mode: false)
and data not show...

@twixi Can you try applying the change from #18500 to see if it fixes it for you?

I do not understand what needs to be done.... in #18500

I'm still getting this error after the change from #18500.

WARNING: /core/DataTable/Row.php(806): Trying to add two strings in DataTable\Row::sumRowArray: 2022-01-10 00:06:28 + 2022-01-10 00:05:06 for column _metadata in row # ['label' => 'gaming', 'nb_visits' => 14459, 'nb_actions' => 63012, 'Actions_nb_pageviews' => 26368, 'Goal_revenue' => 0, 'Goal_nb_conversions' => 0, '_metadata' => array ( 'ts_archived' => '2022-01-10 00:06:28', ), 'visits_evolution' => 0.049, 'visits_evolution_trend' => 1, 'actions_evolution' => 0.02, 'actions_evolution_trend' => 1, 'pageviews_evol (Module: MultiSites, Action: getAllWithGroups, In CLI mode: false)

@bx80 could there maybe be still an issue?

Thanks to everyone following up on this issue, it looks like the fix in #18500 didn't work.

This is probably because unsummable columns are only checked for top level column names, if the column is an array (as it is in this case _metadata) then the array keys are not checked against the unsummable columns, so an attempt to sum up ts_archived is still being made even though it is meant to be ignored.

I will create another PR to also check array keys against the unsummable columns list when summing row data, which should hopefully resolve this warning message.