Custom Package Uipath

I’ve created a Class Library in Visual [studio] and using Nuget package explorer I converted it to Package. My agenda is to use The Class-Library’s available Methods in Invoke method activity. When I trying to install this package in UiPath It says the following package cannot be installed and showing This Error,
21.4.0+Branch.master.Sha.9d7faf3cba616937d3771694eed2d5957b29427c

The following package(s) can not be installed:
MyPackage 1.0.0

Hello @Tan_singh_Rathore!

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