Link to reproduce: http://demo.piwik.org/?module=API&method=UserSettings.getPlugin&idSite=7&period=day&date=today&format=JSON&token_auth=anonymous&filter_truncate=3
message: "API returned an error: Trying to add two strings values in DataTable_Row::sumRowArray: '79.6%' + '54.4%'"
Maybe it could count how many other plugins are available instead of adding the percentages?
Background: I am using filter_truncate on all reports of the dashboard in new Piwik Mobile app
In 7853d2d: fixes #3892 Fixing + testing filter_truncate on getPlugin
btw the fix is not ideal (the "nb_visits" is pretty incorrect / pointless) but at least it works ;)