How to solve problems with Unity?

Question

C++ / C#

In Unity, even in a newly created project, there are a number of errors:

Socket: bind failed, error: An attempt was made to access a socket by a method forbidden by access rights. (10013)

Unable to join player connection multicast group.

Assembly for Assembly Definition File 'Packages/com.unity.textmeshpro/Tests/Runtime/Unity.TextMeshPro.Tests.asmdef' will not be compiled, because it has no scripts associated with it. UnityEditor.Scripting.ScriptCompilation.EditorCompilationInterface:TickCompilationPipeline (UnityEditor.Scripting.ScriptCompilation.EditorScriptCompilationOptions,UnityEditor.BuildTargetGroup,UnityEditor.BuildTarget)

The latter is only the first time you run the created project.

Unity version - 2019.4.26f1 (64-bit)

What is the reason for this and how to fix it?

PS The answers I found do not help.

Answer 1

This bug is largely related to UnityCollaborate, if updating it through the package manager does not help, then update the editor to version 2020.1.3f1 or higher. Install and run Unity with administrator rights.