I will try to give all the detail I can because I have been fighting this since 5am on Thanksgiving Thursday (3 days ago). I have also already submitted a bug report with no response at this time. I've researched into the problem on google and only found 2 similar posts which I will link after going over what I have interpreted of this issue. To begin, I would like to explain what is happening. Using Unity Hub 2.2.1 (this problem started with 2.2.0), I can create a new project, perform changes and save this new project, but attempts to open the project from the Unity Hub will fail with a 1 second error display of "unity is already in list. you cannot locate the same version." This error also occurs with older projects from previous versions. When attempting to open these projects, the Unity Editor splash screen will display for a brief moment before Unity Hub is reopened and the error "unity is already in list. you cannot locate the same version" is displayed before immediately disappearing from the Hub. I had to use Snipping Tool in order to freeze a screenshot of my desktop so I could read the error displayed because it is gone that quickly. Again, this is only when attempting to open any existing project. This error does not occur when creating a new project. The problem started when I applied a new Personal Unity License. On the day this first happened, Unity Hub asked me to Manage my License. It seemed to have forgotten that I was on a Personal use License and asked me to apply a new one. I went through the process of a manual activation for a new Personal License since I am just starting as a developer. This also wasn't the first time it had me apply a new license. Since I have done this, the hub has had this problem with opening my project files. I can no longer work on my game. I have been trying to fix it for 3 days with no luck. The fixes I have tried include: - Uninstalling and Reinstalling Unity Hub (multiple attempts) - Uninstalling and Reinstalling 3 different versions of the Unity Editor (multiple attempts) - Attempting to Apply new Unity Personal License (multiple attempts) - Attempting to Return Personal License and Apply new Unity Personal License (multiple attempts) - Uninstalling all versions of Unity Editors and Unity Hub, Restarting Computer, and Reinstalling - Uninstalling and Reinstalling Visual Studio and all Unity Editors and Unity Hub - Restarting my Internet Connection After all of these attempts, I have now decided to turn to the forums. I found the following 2 posts which suggested a clean wipe of my computer with a fresh install of windows (this is not a viable solution nor should it ever be), and adjusting my internet (Unity Hub will not open projects without server access). The related posts can be found here https://forum.unity.com/threads/sol...st-you-cannot-locate-the-same-version.784976/ and here https://forum.unity.com/threads/unity-is-already-in-list-you-cannot-locate-the-same-version.785405/ There is a working solution in the post chain. I am quoting it here.