After installing the new Passolo 2022 CU3 (22.0.135.0) the following error message is thrown on startup, when using a Network license:

Cannot find license information.
     Check for product activation 
          Licensing error: Error acquiring license.
Could not load file or assembly 'System.Memory, Version=4.0.1.1,
Culture=neutral, PublicKeyToken=cc7b13ffcd2ddd51' or one of its dependencies. The system cannot find the file specified.



The main error may also be: 

An error occurred while requesting a license. Click Retry to try again.



 

Install the new LicenseServerManager19.0.79 on the server \ computer where the network license is activated, instead of the older versions, License Server Manager 16.2.496 or SDLLicenseServerManager_2.0.27550, which are no longer compatible with Trados Studio 2021 SR2 CU10 - 16.2.10.9305.
 
There is no need to uninstall the old version of the License Server Manager or deactivate the licenses prior to installing the new version. Simply double-click on the installer, once downloaded from your RWS Account, under Products & Plans > Downloads > LicenseServerManager18.0.79, or the direct link below and it will overwrite the old version.

https://downloadcentercdn.sdl.com/TP/Trados/T2024/Licensing/RTM/LicenseServerManager18.0.79.exe

Note: The new version of License Manager is compatible with older version of Trados Studio / Passolo. 

Passolo 2022 CU3 - 22.0.135.0 and newer is not compatible with License Server Manager 16.2.496 or SDLLicenseServerManager_2.0.27550.