Unity Hub don't launch project

Why Unity Hub can not launch Unity? It try launch, but nothing work.

 

So what does it do? What happens when you create a brand new empty project and open that? What does the editor log say when it fails to open a project?

 

Unity Hub normal run Unity when I create new project.
But if I try run existing project - Unity Hub try launch Unity (show window preload Unity for several seconds) and Unity hide.

 

Yeah check the editor log. See what it says is the problem. Can also try deleting the project's library folder. Unity will rebuild the library folder when it opens the project.

 

ump.log

Code (CSharp):

1. [2020-07-21T19:48:19.969Z][INFO] Starting Server
2. [2020-07-21T19:48:19.980Z][INFO] Server started on port [61077]
3. [2020-07-21T19:48:20.479Z][INFO] Health Request received
4. [2020-07-21T19:48:22.197Z][INFO] Resolving dependencies using SAT solver
5. [2020-07-21T19:48:52.998Z][INFO] Resolving dependencies using SAT solver

Editor-prev.log

Code (CSharp):

1. [LicensingClient] ERROR Failed to connect to local IPC
2. [Licensing::Module] Failed to connect to channel: LicenseClient-Anton
3. [Licensing::Module] Successfully launched the LicensingClient
4. [Licensing::Module] Successfully connected to LicensingClient on channel: LicenseClient-Anton
5. [Licensing::Module] Successfully launched and connected to LicensingClient
6. Entitlement-based licensing initiated
7. [LicensingClient] Licenses Updated successfully in LicensingClient
8. LICENSE SYSTEM [2020721 22:47:45] Next license update check is after 2020-07-22T18:44:06
9. Built from '2019.4/staging' branch; Version is '2019.4.4f1 (1f1dac67805b) revision 2039212'; Using compiler version '191627012'
10. OS: 'Windows 10  (10.0.0) 64bit' Language: 'ru' Physical Memory: 32716 MB
11. [Licensing::Module] License is not active (com.unity.editor.ui). HasEntitlements will fail.
12. BatchMode: 0, IsHumanControllingUs: 1, StartBugReporterOnCrash: 1, Is64bit: 1, IsPro: 0
13. No valid Unity Editor license found. Please activate your license.
14. [Package Manager] Server::Start -- Port 50159 was selected

 

From what you posted, looks like you have a license problem. Try reactivating your license.

 

I tried several times reactivating license and reinstall Unity/Unity Hub. Doesn't helped it me.