title: Copying assembly from 'Temp/Assembly-CSharp.dll' to 'Library/ScriptAssemblies/Assembly-CSharp.dll' failed UNITY3D error
body: <p><a href="https://i.stack.imgur.com/S5oWZ.png" rel="nofollow noreferrer">The image shows the error in the editor.</a>This error is appearing in a completely new project, before I have made any changes. This is the error I keep receiving in the Unity Editor. I have updated Unity to the latest version - 2019.1.9.f1. I am unable to use Unity because of this error. Based on other threads talking about this topic, I have tried their suggestions like :</p>
  
  <ol>
  <li>"Reimporting all scripts".</li>
  <li>Clearing the "Temp" folder.</li>
  <li>"Reset packages to default" option.</li>
  <li>Made exceptions in the antivirus. Also tried by removing the antivirus completely.</li>
  <li>Made changes to the project and saved it. Then reopened the project, but the error was still there.</li>
  </ol>
  
  <p>All these suggestions could not help me solve the error. I am unable to build anything. My projects have come to a standstill.</p>
  
  <p>ALSO, I had been receiving the same error for textmeshpro also. I resolved that by uninstalling the package. It's related, but I can't find the issue.</p>
  
  <p>I am a bit desperate, and would appreciate any help in this matter. </p>