On clicking "About Unity" Button causes the editor to throw ArgumentNullExceptionthrown, refer the attached video.

Steps to repro:
1. Create a new project
2. Help >About Unity

Actual Result:
ArgumentNullExceptionthrown threw on clicking About Unity

Expected Result:
About Unity Window Open without any error

Reproducible on:
2020.2.0a13

Working fine on:
2020.2.0a12, 2020.1.0b10

Environment:
Windows 10 & macOS 10.14

Stack trace
ArgumentNullException: Value cannot be null.
Parameter name: stream
System.IO.StreamReader..ctor (System.IO.Stream stream, System.Text.Encoding encoding, System.Boolean detectEncodingFromByteOrderMarks, System.Int32 bufferSize, System.Boolean leaveOpen) (at <fb001e01371b4adca20013e0ac763896>:0)
System.IO.StreamReader..ctor (System.IO.Stream stream, System.Boolean detectEncodingFromByteOrderMarks) (at <fb001e01371b4adca20013e0ac763896>:0)
System.IO.StreamReader..ctor (System.IO.Stream stream) (at <fb001e01371b4adca20013e0ac763896>:0)
(wrapper remoting-invoke-with-check) System.IO.StreamReader..ctor(System.IO.Stream)
UnityEditor.AboutWindowNames.ParseCredits () (at <d302ee0b7fcd4d8184c0fe84f62c3cc1>:0)
UnityEditor.AboutWindowNames.ParseCreditsIfNecessary () (at <d302ee0b7fcd4d8184c0fe84f62c3cc1>:0)
UnityEditor.AboutWindow.OnEnable () (at <d302ee0b7fcd4d8184c0fe84f62c3cc1>:0)
UnityEditor.AboutWindow:ShowAboutWindow()