Can't launch Unity 2019, but unity 2021 works normally

Questions & Answers
1

Unity 2019 shows it’s splash screen for 5-10 seconds and closes then.
Looks like some licensing problem, because 2019 version uses legacy licensing system. tried to remove licence, reinstall unity /unity hub, launch unity without hub.

  • Got editor log from 2019 version:

Initiating legacy licensing module

LICENSE SYSTEM [202297 4:32:44] Next license update check is after 2022-09-07T22:21:10

Built from ‘2019.2/staging’ branch; Version is ‘2019.2.18f1 (bbf64de26e34) revision 12318285’; Using compiler version ‘191627012’
OS: ‘Windows 10 (10.0.0) 64bit’ Language: ‘ru’ Physical Memory: 32677 MB
BatchMode: 0, IsHumanControllingUs: 1, StartBugReporterOnCrash: 1, Is64bit: 1, IsPro: 0
[Package Manager] Server::Start – Port 53984 was selected

COMMAND LINE ARGUMENTS:
C:\Program Files\Unity\Hub\Editor\2019.2.18f1\Editor\Unity.exe
-projectpath
C:\Old H\Unity projects\Annihilator-cannon
-useHub
-hubIPC
-cloudEnvironment
production
-licensingIpc
LicenseClient-96per
-hubSessionId
262df190-2e2b-****-8df4-c18c09a1bac4
-accessToken
NYkORUSUMZHm*****sG8ArkoKSIfzS768WQ011f
Exiting without the bug reporter. Application will terminate with return code 0

  • and 2021 version:

LICENSE SYSTEM [202297 4:21:10] Couldn’t set permissions of the license file (Win32_AddFileAccessRights).

LICENSE SYSTEM [202297 4:21:10] Current license is already valid and activated. Skipping license activation process (Provided username/password will be ignored).
Built from ‘2021.3/staging’ branch; Version is ‘2021.3.6f1 (7da38d85baf6) revision 8233869’; Using compiler version ‘192829333’; Build Type ‘Release’
OS: ‘Windows 11 (10.0.22000) 64bit CoreSingleLanguage’ Language: ‘ru’ Physical Memory: 32677 MB
[Licensing::Module] Serial number assigned to: “F4-6FWD-CQ29-8754-UYU3-XXXX”
BatchMode: 0, IsHumanControllingUs: 1, StartBugReporterOnCrash: 1, Is64bit: 1, IsPro: 0
[Package Manager] Server::Start – Port 56335 was selected

COMMAND LINE ARGUMENTS:
C:\Program Files\Unity\Hub\Editor\2021.3.6f1\Editor\Unity.exe
-projectpath
C:\Old H\Unity projects\DeepWell3D
-useHub
-hubIPC
-cloudEnvironment
production
-licensingIpc
LicenseClient-96per
-hubSessionId
262df190-2e2b-****-8df4-c18c09a1bac4
-accessToken
NYkORUSUMZHm*****sG8ArkoKSIfzS768WQ011f
Successfully changed project path to: C:\Old H\Unity projects\DeepWell3D
C:/Old H/Unity projects/DeepWell3D
[UnityMemory] Configuration Parameters - Can be set up in boot.config
… other loading data

2

I’m having the same problem with Unity 2019.4.25. I can’t launch the editor, shows 5 sec splash screen.

But I can launch Unity 2021.

3

Check out these two posts: I can’t activate the license in unity hub + Unity Hub 2.3.0 Doesnt load my project.

I tried a few things from the posts above. Re-activating disabled network devices solved it for me.

My issue was that Unity 2019 suddenly stopped opening one day even though Unity 2021 was fine. I assume this was due to a Unity Hub upgrade (v3.4.2 at time of writing, though it could have been an earlier issue because I rarely opened this 2019 project). My hardware was unchanged.

Note that my fix may have been a combination of the following things I tried:

  • Re-activate any disabled Ethernet and Wi-Fi network devices: Control Panel -> Network and Internet -> Netork Connections
  • Return all licenses in Unity Hub. Close and re-open Unity Hub, or restart PC. (I think this is an important step to any solution attempts.)
  • Active license in Unity Hub with Run as Administrator (I’m not sure if this did anything.)
  • Try to activate Unity 2019 in batch mode (I don’t think this worked): "C:\Program Files\Unity\Editor\Unity.exe" -batchmode -username name@example.edu.uk - password XXXXXXXXXXXXX -serial E3-XXXX-XXXX-XXXX-XXXX-XXXX –quit

Notes on other ideas:

  • Full re-install of Unity Hub and Unity Editor. Make sure there are no old files remaining
  • Try to activate legacy Unity first
  • Try to activate legacy Unity without Unity Hub?
  • Contact Unity Support