The issue is fixed in newer versions of Trados Studio and upcoming CU14 for Passolo.
Solution 1: (works for all versions): Activate your license offline:
Offline activation and deactivation of a Single User License for Trados Studio/ PassoloSolution 2: For older versions a change in the config file is required by adding the line
<AppContextSwitchOverrides value="Switch.System.Net.DontEnableSystemDefaultTlsVersions=false"/>
inside the
<runtime> element.
This operation requires Administrator rights
- For Passolo the file is psl.exe.config found in C:\Program Files (x86)\SDL\SDL Passolo\SDL Passolo 2018
- For Trados Studio the file is SDLTradosStudio.exe.config found in C:\Program Files (x86)\SDL\SDL Trados Studio\Studio5