Issue:

You have Maya 2019 and 2020 installed on the system, Maya 2019 is working fine with USER license, but Maya 2020 exits loading after selecting Single-user option on Let’s Get Started dialog window.  Maya 2020 exits before opening Output window doesn’t open and doesn’t display errors on the screen or in Windows Event Viewer.

MayaCLM-dd-mm-yyyy.log file, which can be located in Windows current user’s TEMP folder, holds following errors:

2020-01-06 11:24:41: ====== BEGIN MAYA CLM LICENSE DIAGNOSTICS (level 2) ======
2020-01-06 11:24:41: INFO: MAYA VERSION: Autodesk Maya 2020
2020-01-06 11:24:41: INFO: Desktop Licensing Runtime Version: 2.6.3.31
2020-01-06 11:24:41: INFO: Desktop Licensing API version in Maya: 2.6.3.31
2020-01-06 11:24:41: INFO: initialize: GetInstance (Success)
2020-01-06 11:24:47: INFO: Received LicenseUpdateCallback for Maya 2020 (ADLSDK_UPDATE_REASON_LICENSE_UPDATE): NOT Authorized
2020-01-06 11:24:47: ERROR: Error Information: Maya 2020 : user canceled authorization
2020-01-06 11:24:47: ERROR: adlsdkAuthorize returned with error code: ADLSDK_STATUS_LICENSE_CHECKOUT_ERROR
2020-01-06 11:24:47: ERROR: checkinLicense: unable to release authentication handle
2020-01-06 11:24:47: INFO: shutdown: normal exit

Causes:

Corrupted AdSSO component installation for 2020 products or user license cache file loginstate.xml. 

Solution:

  1. Firstly, Start Maya 2019 and sign out the user (Click on User name in Maya tool paler and select sign out).
  2. Next, Delete %LOCALAPPDATA%\Autodesk\Web Services\LoginState.xml file
  3. Then, Install Autodesk Single Sign On Component Update for 2020 product versions
    • Download AdSSO_2020_1_64-bit–Update_Installer.zip from the article mentioned above.
    • Unzip the file.
    • Double click on AdSSO.msi file.
    • Follow the installation wizard, if the wizard presents Repair and Remove options only, select Remove.
    • Complete steps for removing currently installed AdSSO component
    • After removing AdSSO finishes, doubleclick on AdSSO.msi, accept the agreement and proceed with the install.
  4. Lastly, Start Maya 2020 and sign in with your Autodesk account credentials.

Refer to some related articles:
Maya 2019.2 installation on Linux via rpm
Super Renders Farm – Powerful and Smart Cloud Render Farm
Phoenix FD 3.99 Beta for 3DS Max and Maya

Source: https://knowledge.autodesk.com/support/maya/troubleshooting/caas/sfdcarticles/sfdcarticles/Maya-2020-exits-loading-after-selecting-Sing-user-licensing-option.html?v=2020

Refer to render farm service:  https://superrendersfarm.com/

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