First of all, wrt GetAppacredentials.xaml file, I would recommend to not use this file. Instead directly use get credential activity wherever you want to fetch your credentials. This file is no more available in re-framework with latest uipath versions anyway and is not suggested to be used from code review point of view as well.
Hence, directly use ‘Get credential’ activity.
Also, where are you storing your credentials currently?
You can simply save your credentials on orchestrator as asset and then fetch same using get credentials activity and use it in further steps.
Hello I tried every possible way, i even installed UIpath.credentials.Activities(2.0.0) package, I’m storing my credentials in orchestrator as asset…but still I’m getting this exception repeatedly…can you take a look at my prjct once and lemme know where it went wrong?