CS0433 error upon installation of Addressables package.

I imported package Addressables 1.1.4 into my project and I get following errors

this type of errors (1 samples)

Code (CSharp):

1. Library\PackageCache\com.unity.addressables@1.1.4-preview\Runtime\ResourceManager\AsyncOperations\AsyncOperationBase.cs(37,32): error CS0433: The type 'Task<TResult>' exists in both 'System.Threading, Version=1.0.3333.0, Culture=neutral, PublicKeyToken=402899b480e6f383' and 'mscorlib, Version=4.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089'

I have under settings
Scripting runtime version: .NET 4.x Equivalent
Scripting backend: IL2CPP
Api compatibility level: .NET 4x

As I understand, \Runtime\ResourceManager\AsyncOperations\AsyncOperationBase.cs file has a dependency conflict with mscorlib. I have been googling for several hours now, and I am at my wits end. Maybe someone can suggest a course of action to resolve such error

 

Interestingly enough I created A new empty project and added a single package (addressables) and it threw no error. So there is something happening in that other project. Since the conflict is between mscorlib and addressables package file, I am not sure where to start.. maybe I need to perform some kind of "clean" ?

 

Most likely this is due to some part of your code defining what Task is. What's odd is that the line in question is explicitly
System.Threading.Tasks.Task<object>, so it should be totally clear. In any case, search or code for something like "using Task = ". This syntax can declare "Task means mscorlib", which for us, it doesn't. If that is your problem, then you can move that using inside the namespace using it.

If that isn't your problem, perhaps file a bug against unity with the project, and we'll be able to hunt it down.