Exception: Object is invalid, value 3 is not a string

[SRK-AFH]

{"reqId":"Z6HNRLC9LoSqENu-VtRZ5QAAAMI","level":3,"time":"2025-02-04T08:18:13+00:00","remoteAddr":"2a02:8106:22:bb00:51dc:55b7:1e11:fa20","user":"Klausch","app":"activity","method":"GET","url":"/ocs/v2.php/apps/dashboard/api/v2/widget-items?widgets%5B%5D=activity","message":"Object is invalid, value 3 is not a string","userAgent":"Mozilla/5.0 (Windows NT 10.0; Win64; x64; rv:134.0) Gecko/20100101 Firefox/134.0","version":"31.0.0.12","exception":{"Exception":"OCP\\RichObjectStrings\\InvalidObjectExeption","Message":"Object is invalid, value 3 is not a string","Code":0,"Trace":[{"file":"/home/sites/site100006357/web/lib/private/RichObjectStrings/Validator.php","line":59,"function":"validateParameter","class":"OC\\RichObjectStrings\\Validator","type":"->"},{"file":"/home/sites/site100006357/web/apps/activity/lib/GroupHelper.php","line":74,"function":"validate","class":"OC\\RichObjectStrings\\Validator","type":"->"},{"file":"/home/sites/site100006357/web/apps/activity/lib/GroupHelper.php","line":46,"function":"addEvent","class":"OCA\\Activity\\GroupHelper","type":"->"},{"file":"/home/sites/site100006357/web/apps/activity/lib/Data.php","line":231,"function":"addActivity","class":"OCA\\Activity\\GroupHelper","type":"->"},{"file":"/home/sites/site100006357/web/apps/activity/lib/Dashboard/ActivityWidget.php","line":136,"function":"get","class":"OCA\\Activity\\Data","type":"->"},{"file":"/home/sites/site100006357/web/apps/dashboard/lib/Controller/DashboardApiController.php","line":119,"function":"getItemsV2","class":"OCA\\Activity\\Dashboard\\ActivityWidget","type":"->"},{"file":"/home/sites/site100006357/web/lib/private/AppFramework/Http/Dispatcher.php","line":200,"function":"getWidgetItemsV2","class":"OCA\\Dashboard\\Controller\\DashboardApiController","type":"->"},{"file":"/home/sites/site100006357/web/lib/private/AppFramework/Http/Dispatcher.php","line":114,"function":"executeController","class":"OC\\AppFramework\\Http\\Dispatcher","type":"->"},{"file":"/home/sites/site100006357/web/lib/private/AppFramework/App.php","line":161,"function":"dispatch","class":"OC\\AppFramework\\Http\\Dispatcher","type":"->"},{"file":"/home/sites/site100006357/web/lib/private/Route/Router.php","line":306,"function":"main","class":"OC\\AppFramework\\App","type":"::"},{"file":"/home/sites/site100006357/web/ocs/v1.php","line":49,"function":"match","class":"OC\\Route\\Router","type":"->"},{"file":"/home/sites/site100006357/web/ocs/v2.php","line":7,"args":["/home/sites/site100006357/web/ocs/v1.php"],"function":"require_once"}],"File":"/home/sites/site100006357/web/lib/private/RichObjectStrings/Validator.php","Line":85,"message":"Object is invalid, value 3 is not a string","exception":[],"CustomMessage":"Object is invalid, value 3 is not a string"},"id":"67a1cd607e8af"}